What will be the output of the following code snippet?
#include <stdio.h>
void solve() {
bool ok = false;
printf(ok ? "YES" : "NO");
}
int main() {
solve();
return 0;
}
a)
Yes
b)
No
c)
Compilation Error
d)
None of the above
Correct answer is option 'C'. Can you explain this answer?

Question

What will be the output of the following code snippet?

#include <stdio.h>
void solve() {
bool ok = false;
printf(ok ? "YES" : "NO");
}
int main() {
solve();
return 0;
}

a)
Yes
b)
No
c)
Compilation Error
d)
None of the above

Correct answer is option 'C'. Can you explain this answer?

Answer

The code snippet will result in undefined behavior because the variable ok is uninitialized. In C, variables that are not explicitly initialized can have unpredictable values.

The printf statement uses the ternary operator (ok ? "YES" : "NO") to determine the string to be printed based on the value of ok. However, since ok is uninitialized, its value is indeterminate.

Therefore, the output of the printf statement cannot be determined reliably. It could print "YES" or "NO" or any other unexpected result depending on the uninitialized value of ok.

As a result, the correct answer is C. None of the above.

Answer

Explanation:

Compilation Error:
- The code snippet will throw a compilation error because the data type `bool` is not recognized in standard C.
- The `bool` data type is introduced in C++ (C++98) and C99, but not in standard C (C89).
Therefore, the correct answer is option 'C' - Compilation Error.

Similar Electrical Engineering (EE) Doubts

What will be the output of the following code snippet?#include <stdio.h>void solve() { int x = 1, y = 2; printf(x > y ? "Greater" : x == y ? "Equal" : "Lesser");}int main() { solve(); return 0;}

What will be the output of the following code snippet?#include <stdio.h>#define VAL 5int getInput() { return VAL;}void solve() { const int x = getInput(); printf("%d", x);}int main() { solve(); return 0;}

What will be the output of the following code snippet?#include <stdio.h>void solve() { int x = 1, y = 2; printf(x > y ? "Greater" : x == y ? "Equal" : "Lesser");}int main() { solve(); return 0;}

What will be the output of the following code snippet?#include <stdio.h>void solve() { printf("%d ", 9 / 2); printf("%f", 9.0 / 2);}int main() { solve(); return 0;}

What will be the output of the following code snippet?#include <stdio.h>void solve() { int ch = 2; switch(ch) { case 1: printf("1 "); case 2: printf("2 "); case 3: printf("3 "); default: printf("None"); }}int main() { solve(); return 0;}

Top Courses for Electrical Engineering (EE)View all

Network Theory (Electric Circuits)

GATE Electrical Engineering (EE) Mock Test Series 2026

General Aptitude for GATE

GATE Notes & Videos for Electrical Engineering

Engineering Mathematics

Top Courses for Electrical Engineering (EE)

Top Courses for Electrical Engineering (EE)

Related Content

Mock Test Series

Subject-wise Courses

Subject-wise Courses

Other Engg Branches

Company