I/O in C (printf and scanf)

I/O in C (printf and scanf)

printf()

We have already touched base with printf(). We know that the header file <stdio.h> contains information about the printf output routine.

scanf()

<stdio.h> also contains information about the routine that is used to get user inputs to a C program, scanf().

The same I/O directives are used with scanf() for the different data types.

Here's an example



#include <stdio.h>


void main( )
{
  	int      a;
  	char   b;

  	printf("Enter an int and a char: ");
  	scanf("%d %c", &a, &b);
  	printf("You entered %d, %c\n", a, b);
}

Here's the output

Enter an int and a char: <user enters33 x>

You entered 33, x

Will talk more about '&' in the section on "Pointers". For now, it should be sufficient to know that you have to use '&' with scanf() as shown in the example.

#include <stdio.h> void main( ) { int a; char b; printf("Enter an int and a char: "); scanf("%d %c", &a, &b); printf("You entered %d, %c\n", a, b); }

#include <stdio.h>

void main( ) { int a; char b; printf("Enter an int and a char: "); scanf("%d %c", &a, &b); printf("You entered %d, %c\n", a, b); }