C good questions and answer

Good questions in c programming language.

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

void  main(){

enum data{a,b,c};

clrscr();

printf("%i %i %i",a,b,c);

getch();

}

Output: 0 1 2

Explanation:

By default initial value of first enum constant is zero. Value of next enum constant will be:

Next_enum_constant_value=previous_enum_constant_value+1

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

void main(){

enum data{a,b=5,c};

clrscr();

printf("%i %i %i",a,b,c);

getch();

}

Output: 0 5 6

Explanation:

By default initial value of first enum constant is zero. Value of next enum constant will be:

Next_enum_constant_value=previous_enum_constant_value+1

This formal is valid if enum constant is not explicitly initialized. Otherwise it will store initialized value.

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

void main(){

enum data1{a,c,e}p;

enum data2{b,d,f}q;

p=q;

clrscr();

printf("%i",p);

getch();

}

Output: 0

Standard predefined stream question in c programming language.

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

#include"stdio.h"

void  main(){

clrscr();

fputs("ERROR page",stderr);

getch();

}

Output: ERROR PAGE

Explanation:

It will display the output of program on standard error page