Converting lowercase to uppercase in C++

Here we are converting lowercase to uppercase in C++ by using an additional library in our includes;Here is a code which is able of converting a string from lowercase to uppercase:

1. // converting lowercase to uppercase in C++
2. #include <iostream>
3. #include <cctype>
4. using namespace std;
5. void convertToUppercase( char * );
6.  
7. int main()
8. {
9.     char phrase[] = “characters and $32.98”;
10.     cout << “The phrase before conversion is: “ << phrase;
11.     convertToUppercase( phrase );
12.     cout << “nThe phrase after conversion is:  “
13.         << phrase << endl;
14.     return 0;  // indicates successful termination
15. }
16.  
17. // convert string to uppercase letters
18. void convertToUppercase( char *sPtr )
19. {
20.     while ( *sPtr != ‘’ ) {   // current character is not ‘’
21.         if ( islower( *sPtr ) )  // if character is lowercase,
22.             *sPtr = toupper( *sPtr );  // convert to uppercase
23.         ++sPtr;  // move sPtr to next character in string
24.     }
25. }

in the above code we used an new library named “cctype”, then we defined a function which is includes the function of “islower” and “toupper” from the “cctype” library, then we selected a phrase from our main() and passed it to the function as an argument, and at the end we are done with converting lowercase to uppercase in C++.