C Puzzle -03

What is the return value of printf() and scanf() functions in C?

scanf() : It returns the number of inputs scanned successfully from keyboard.

Example:

#include <stdio.h>

int main()

{

   int a,b,c,n;

   printf("Enter the values for a, b and c\n");

   n=scanf("%d%d%d",&a,&b,&c);  // The variable n receive the return value of scanf

   printf("%d",n);

   return 0;

}

Output

Enter the values for a, b and c

10

20

30

3

printf() : It returns the number of bytes/characters printed on the screen.

Example

#include <stdio.h>

int main()

{

   int n,x;

   n=10;

   x=printf("%d",n);

   printf("\nx=%d bytes",x);

   return 0;

}

Output

10

x=2 bytes