PROGRAM-15

// Program for putchar

#include

#include

#include

void main()

{

                clrscr();

                char alpha;

                printf("press any alphabet : ");

                alpha=getchar();

                if (islower (alpha))

                {

                  printf("after changing case alpha is : ");

                  putchar(toupper (alpha));

                }

                else

                {

                  printf("after changing case alpha is : ");

                  putchar(tolower (alpha));

                }

                getch();

}

Algorithm

·                     Start

·                     Declare alpha as character

·                     Write("any alphabet ")

·                     alpha=getchar()

·                     if (islower (alpha))

·                     Read("after changing case alpha is ")

·                      putchar(toupper (alpha))

·                     Else

·                     Read("after changing case alpha is ")

·                     putchar(tolower (alpha))

·                     Stop