What is the output of following Program ? Here what is the role of %dn inside printf .

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C#

#include <stdio.h>

void main()
{
        int a = 100;
        int b = 3;
        int c;

        c = a + b;
        printf( "a + b = %dn", c );

        c = a - b;
        printf( "a - b = %dn", c );

        /* multiplication performed before call to printf() */
        printf( "a * b = %dn", a * b );

        c = a / b;
        printf( "a / b = %dn", c );

        c = 100 % 3;
        printf( "a % b = %dn", c );
}

Posted 30-Sep-15 0:57am

Member 10611055

Updated 30-Sep-15 0:58am

v2

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3 solutions

Solution 2

Umm, %d is used to format the string. But here n is used along with the %d, which means there's something missing i.e. \ or n itself if you want to print n after the variable value.

So in short, it signifies a decimal number followed by a character n.

-KR

Posted 30-Sep-15 1:12am

Krunal Rohit

Solution 3

Run it and see.

But I suspect that the "n" part should be "\n" for a new line instead.

Why ask us to run a program for you? This is trivial: paste it into your IDE, build the app, and run it!

Posted 30-Sep-15 1:14am

OriginalGriff

Comments

Leo Chapiro 30-Sep-15 7:42am

>This is trivial: paste it into your IDE, build the app, and run it!

This is even more trivial: paste it into http://codepad.org :)

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Leo Chapiro · Accepted Answer · 2015-09-30T01:08:00

Solution 1

%d means that the output is a digit (Signed decimal integer): http://www.cplusplus.com/reference/cstdio/printf/[^]
You are missing backslash in "\n", try this:

C

#include <stdio.h>

void main()
{
        int a = 100;
        int b = 3;
        int c;

        c = a + b;
        printf( "a + b = %d\n", c );

        c = a - b;
        printf( "a - b = %d\n", c );

        /* multiplication performed before call to printf() */
        printf( "a * b = %d\n", a * b );

        c = a / b;
        printf( "a / b = %d\n", c );

        c = 100 % 3;
        printf( "a % b = %d\n", c );
}

Posted 30-Sep-15 1:08am

Leo Chapiro

Updated 30-Sep-15 1:11am

v3

Comments

CHill60 30-Sep-15 7:10am

Good spot!

Leo Chapiro 30-Sep-15 7:12am

Thank you, mate! :)

Member 10611055 30-Sep-15 7:24am

I also know about \n is for new line, but I attend one written exam of one company their all programs printf statement written like.. printf("%d %dn",x,y).
this type of statement also wriiten on one site i,e: http://www.exforsys.com/tutorials/c-language/c-operators.html

Leo Chapiro 30-Sep-15 7:41am

Yes, I've taken a look, this is an error on the site!