C coding good questions and answer

C coding good questions and answer

(1) What will be output of the following code?

#include"stdio.h"

void  main(){

char a='\\';

clrscr();

a=a-'/';

printf("%d",a);

getch();

}

Output: error

Explanation:

Character is \ has special meaning in c programming. For example:

‘\0’ represents octal character.

‘\n’ represents new line character. So we cannot use ‘\’ directly.

(2) What will be output of the following c code?

#include"stdio.h"

void  main(){

char a='\5';

clrscr();

a=a<<2;

printf("%x",a);

getch();

}

Output: 14

Explanation: ‘\5’ means octal 5.

(3) What will be output of the following program?

void main(){

clrscr();

printf("%d",__LINE__);

getch();

}

Output: 3

Explanation:

__LINE__ is global identifier in c programming language. It returns an integer which is equal to total number of line in c source code program up to __LINE__ including that line.

e.g.

void main(){  //line 1

clrscr();       //line 2

printf("%d",__LINE__);  //line 3

}

(4) What will be output of the following program?

//save this program as test.c

void main(){

clrscr();

printf("%s",__FILE__);

getch();

}

Output: test.c

Explanation:

__FILE__ is global identifier in c programming language. It returns a string containing name of current source file in which this program has been saved.

In you have any problem in C coding good questions and answer, you can ask here.