C Programming - Functions - Discussion
Discussion Forum : Functions - Find Output of Program (Q.No. 3)
3.
What will be the output of the program?
#include<stdio.h>
int i;
int fun();
int main()
{
while(i)
{
fun();
main();
}
printf("Hello\n");
return 0;
}
int fun()
{
printf("Hi");
}
Answer: Option
Explanation:
Step 1: int i; The variable i is declared as an integer type.
Step 1: int fun(); This prototype tells the compiler that the function fun() does not accept any arguments and it returns an integer value.
Step 1: while(i) The value of i is not initialized so this while condition is failed. So, it does not execute the while block.
Step 1: printf("Hello\n"); It prints "Hello".
Hence the output of the program is "Hello".
Discussion:
30 comments Page 2 of 3.
Mounika said:
1 decade ago
Hi friends:
Can anyone explain me why the program is wrong?
#include<stdio.h>
extern int j;
int main()
{
printf("%d",j);
return 0;
}
Can anyone explain me why the program is wrong?
#include<stdio.h>
extern int j;
int main()
{
printf("%d",j);
return 0;
}
Dileep said:
1 decade ago
Ya all the global variable are intialised to zero it, s true I executed the programe also. Yes you can check it many books also.
S satheesh reddy said:
1 decade ago
What @Naveen said is correct, All global variables by default initialized to(0) Zero. So the condition while(0) becomes false.
Vishnu said:
8 years ago
Some compilers give, after while print statement "because default i=0 "
But some compilers executes infinite loop.
But some compilers executes infinite loop.
Naveen said:
1 decade ago
All global variables are initialized to zero.
So here i=0
while(0) //false
So it prints 'Hello'.
So here i=0
while(0) //false
So it prints 'Hello'.
Newb said:
7 years ago
All global initialized to zero is based on the compiler. That may not be true in all cases.
ADDY said:
1 decade ago
Yes definitely global variables are set 0 by default but this output is correct or not.
Sunil said:
1 decade ago
What naveen said is correct, All global variables by default initialized to Zero.
Saieesh said:
8 years ago
Global variables are initialized with zero.
So, while(0) is false condition.
So, while(0) is false condition.
Bhushan said:
1 decade ago
Yes. Golbal variable is by default to 0 so while condition going to fail.
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