program on macros example 1

PROGRAM FOR MACROS EXAMPLE 1

#define NULL 0

void main()

{

    char st[20];

    int i;

    puts("Enter a string:");

    gets(st);

    for(i=0;st[i]!=NULL;i++);

    printf("length=%d",i);

}

OUTPUT:

Enter a string:

Sirisha

Length=7