Example 1

#include<stdio.h>

#include<ctype.h>

main()

{

    int lower,upper;

    lower = getchar();

    upper = toupper(lower);

    putchar(upper);

}

Questions:

1.) What is the difference between getchar() and putchar() ?

2.) Can getchar() have arguments? Justify the answer.

3.) What is the need for ctype.h header file?