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Commit b7c60fc

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1 parent b22f2d2 commit b7c60fc

14 files changed

+456
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lines changed
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#include <iostream>
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using namespace std;
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class grandparent
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{
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protected:
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int base_data;
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public:
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void readgp()
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{
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cout<<"Enter data of grand parent :";
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cin>>base_data;
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}
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};
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class parent1 : public virtual grandparent
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{
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protected:
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int parent1_data;
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public:
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void readp1()
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{
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cout<<"Enter data of parent 1 :";
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cin>>parent1_data;
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}
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};
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class parent2 : virtual public grandparent
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{
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protected:
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int parent2_data;
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public:
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void readp2()
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{
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cout<<"Enter data of parent 2 :";
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cin>>parent2_data;
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}
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};
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class child : public parent1, public parent2
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{
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private:
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int sum;
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public:
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void add()
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{
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sum = base_data + parent1_data + parent2_data;
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}
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void show()
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{
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cout<<"Grandparent's data member = "<<base_data;
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cout<<"\nParent 1 and Parent 2 data member = "<<parent1_data<<"\t"<<parent2_data;
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cout<<"\nSum of all data = "<<sum;
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}
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};
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int main()
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{
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child c1;
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c1.readgp();
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c1.readp1();
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c1.readp2();
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c1.add();
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c1.show();
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return 0;
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}
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#include<iostream>
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using namespace std;
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class base
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{
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public:
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void display()
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{cout<<"Base class display is called\n";}
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};
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class derv1: public base
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{
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public:
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void display()
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{cout<<"Derv1's class display is called\n";}
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};
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class derv2: public base
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{
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public:
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void display()
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{cout<<"Derv2's class display is called\n";}
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};
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int main()
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{
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base *ptr; //pointer to base class
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// base obj;
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// ptr = &obj;
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// ptr->display();
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derv1 d1;
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derv2 d2;
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ptr = &d1; //Address of d1 to base pointer
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ptr->display();
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ptr = &d2; //Address of d1 to base pointer
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ptr->display();
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return 0;
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}

‎Practise Programs/103virtualfn.cpp‎

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#include<iostream>
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using namespace std;
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class base
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{
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public:
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virtual void display()
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{cout<<"Base class display is called\n";}
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};
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class derv1: public base
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{
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public:
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void display()
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{cout<<"Derv1's class display is called\n";}
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};
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class derv2: public base
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{
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public:
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void display()
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{cout<<"Derv2's class display is called\n";}
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};
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int main()
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{
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base *ptr; //pointer to base class
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base obj;
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ptr = &obj;
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ptr->display();
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derv1 d1;
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derv2 d2;
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ptr = &d1; //Address of d1 to base pointer
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ptr->display();
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ptr = &d2; //Address of d1 to base pointer
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ptr->display();
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return 0;
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}

‎Practise Programs/104virtualfneg.cpp‎

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#include<iostream>
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using namespace std;
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class shape
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{
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protected:
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float a,b;
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public:
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void read() { cin>>a>>b; }
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virtual void cal_area()
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{ cout<<"Virtual function"; }
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};
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class rectangle : public shape
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{
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public:
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void cal_area()
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{
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float area = a*b;
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cout<<"\nArea of rectangle = "<<area;
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}
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};
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class triangle : public shape
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{
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public:
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void cal_area()
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{
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float area = (a*b)/2;
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cout<<"\nArea of triangle = "<<area;
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}
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};
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int main()
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{
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shape *ptr;
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rectangle r1;
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cout<<"Enter length and bredth of rectangle ";
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r1.read();
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ptr = &r1;
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ptr->cal_area();
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triangle t1;
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cout<<"\nEnter base and perpendicluar of triangle ";
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t1.read();
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ptr = &t1;
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ptr->cal_area();
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return 0;
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}

‎Practise Programs/105streamgetfn.cpp‎

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// #include<iostream>
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// using namespace std;
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// int main()
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// {
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// const int MAX = 80;
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// char str[MAX];
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// cout<<"Enter a string\n";
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// cin.get(str,MAX);
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// cout<<"String is ="<<str;
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// return 0;
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// }
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#include<iostream>
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using namespace std;
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int main()
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{
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const int MAX = 80;
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char str[MAX];
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cout<<"Enter a string\n";
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cin.getline(str,MAX,'/');
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cout<<"\nString is =\n"<<str;
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return 0;
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}
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#include<iostream>
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using namespace std;
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int main()
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{
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char ch='x';
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cout.put(ch);
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cout.put('\n');
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cout.put('A');
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cout.put('\n');
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cout.put('b');
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cout.write("\n",1);
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cout.write("Hello Friends how are you",13);
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cout.write("\n",1);
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cout.write("Bye",3);
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return 0;
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}

‎Practise Programs/107createfile.cpp‎

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#include<iostream>
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#include<fstream>
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using namespace std;
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int main()
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{
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int rollno,marks;
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char name[20];
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ofstream out_file("stud.txt");
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if(!out_file)
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{
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cerr<<"File cannot open correctly";
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exit(-1);
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}
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cout<<"Enter student details :";
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cout<<"\nRollno :"; cin>>rollno;
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cout<<"Name :"; cin>>name;
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cout<<"Marks :"; cin>>marks;
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cout<<"Writing student details into file...";
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out_file<<rollno<<endl;
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out_file<<name<<endl;
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out_file<<marks<<endl;
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return 0;
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}

‎Practise Programs/108readfile.cpp‎

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#include<iostream>
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#include<fstream>
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using namespace std;
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int main()
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{
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int rollno,marks;
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char name[20];
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ifstream inp_file("stud.txt");
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if(!inp_file)
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{
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cerr<<"File cannot open correctly";
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exit(-1);
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}
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inp_file>>rollno;
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inp_file>>name;
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inp_file>>marks;
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cout<<"Reading student details into file..."<<endl;
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cout<<"\nRollno :"<<rollno;
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cout<<"\nName :"<<name;
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cout<<"\nMarks :"<<marks;
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return 0;
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}
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#include<iostream>
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#include<fstream>
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using namespace std;
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int main()
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{
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char str[80];
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ifstream fin("multiplelines.txt");
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if(!fin)
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{
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cout<<"File cant open";
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exit(-1);
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}
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cout<<"Contents of file ...\n";
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while(fin.eof()==0)
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{
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fin.getline(str,80);
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cout<<str<<endl;
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}
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return 0;
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}

‎Practise Programs/110template.cpp‎

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#include<iostream>
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using namespace std;
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template<class T>
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T min(T &a, T &b) //or void min(T &a, T &b)
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{
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return(a<b)?a:b;
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}
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int main()
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{
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int x,y;
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cout<<"Enter Integer Values"<<endl;
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cin>>x>>y;
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cout<<"Minimum numbers of Integers = "<<min(x,y);
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float p,q;
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cout<<"\nEnter Float Values"<<endl;
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cin>>p>>q;
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cout<<"Minimum numbers of Floats = "<<min(p,q);
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char c1,c2;
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cout<<"\nEnter two characters"<<endl;
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cin>>c1>>c2;
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cout<<"Minimum character value(based on ASCII value) = "<<min(c1,c2);
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return 0;
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}

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