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georgecatalin georgecatalin

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Local and global variable, block level scope example

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Learn_CPP_Programming_Deep_Dive/Section 10 Functions
- Local_global_scope
  - main.cpp
- Local_scope
  - main.cpp
- Return_by_reference
  - main.cpp

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`‎Learn_CPP_Programming_Deep_Dive/Section 10 Functions/Local_global_scope/main.cpp`

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`@@ -0,0 +1,23 @@`
	`1`	`+#include <iostream>`
	`2`	`+`
	`3`	`+using namespace std;`
	`4`	`+`
	`5`	`+int global_var = 12;`
	`6`	`+`
	`7`	`+void fun()`
	`8`	`+{`
	`9`	`+ int local_var = 45;`
	`10`	`+ cout<<"Local variable "<<local_var<<endl;`
	`11`	`+`
	`12`	`+ global_var++;`
	`13`	`+ cout<<"The global variable is "<<global_var<<endl; //13`
	`14`	`+}`
	`15`	`+`
	`16`	`+int main(void)`
	`17`	`+{`
	`18`	`+ cout<<"The global variable is "<<global_var<<endl; //12`
	`19`	`+ fun();`
	`20`	`+ cout<<"The global variable is "<<global_var<<endl; //13`
	`21`	`+`
	`22`	`+ return 0;`
	`23`	`+}`

`‎Learn_CPP_Programming_Deep_Dive/Section 10 Functions/Local_scope/main.cpp`

Lines changed: 20 additions & 0 deletions

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,20 @@`
	`1`	`+#include <iostream>`
	`2`	`+`
	`3`	`+using namespace std;`
	`4`	`+`
	`5`	`+int my_var = 45;`
	`6`	`+`
	`7`	`+int main(void)`
	`8`	`+{`
	`9`	`+ int my_var = 70;`
	`10`	`+`
	`11`	`+ {`
	`12`	`+ int my_var = 69;`
	`13`	`+ cout<<my_var<<endl; //69`
	`14`	`+ }`
	`15`	`+`
	`16`	`+ cout<<my_var<<endl; // 70`
	`17`	`+`
	`18`	`+ cout<<::my_var<<endl; // 45`
	`19`	`+ return 0;`
	`20`	`+}`

`‎Learn_CPP_Programming_Deep_Dive/Section 10 Functions/Return_by_reference/main.cpp`

Lines changed: 10 additions & 0 deletions

Original file line number	Diff line number	Diff line change
`@@ -8,11 +8,21 @@ int & fun(int &a)`
`8`	`8`	`return a;`
`9`	`9`	`}`
`10`	`10`
	`11`	`+int fun1(int b)`
	`12`	`+{`
	`13`	`+`
	`14`	`+ return 2*b;`
	`15`	`+}`
	`16`	`+`
`11`	`17`	`int main(void)`
`12`	`18`	`{`
`13`	`19`	`int x = 1953;`
`14`	`20`
`15`	`21`	`fun(x) = 1954;`
`16`	`22`
	`23`	`+ int y = fun1(3);`
	`24`	`+ cout<<"The value of y is "<<y<<endl;`
	`25`	`+`
	`26`	`+`
`17`	`27`	`cout<<"The value of x is "<<x<<endl;`
`18`	`28`	`}`

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