Database System Concepts
Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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C++

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  • Write a function to convert a given string :

Answer:

#include <iostream>

#include <string>

using namespace std;

void toUpper(string &str)

{

for (int i = 0; i < str.length(); i++)

{

str[i] = toupper(str[i]);

}

}

void toLower(string &str)

{

for (int i = 0; i < str.length(); i++)

{

str[i] = tolower(str[i]);

}

}

int main()

{

string str = "khaled";

toUpper(str);

cout << str << endl;

str = "MOHAMMED";

toLower(str);

cout << str << endl;

return 0;

}

  • Write a function to calculate the sum of the even number from 1 - 100.

Answer:

#include <iostream>

using namespace std;

int sumEven() {

int sum = 0;

for (int i = 1; i <= 100; i++) {

if (i % 2 == 0) {

sum += i;

}

}

return sum;

}

int main() {

cout << sumEven() << endl;

return 0;

}

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