Question

Which of the following has the compilation error in C?
1. int n = 17;
2. char c = 99;
3. float f = (float) 99.32;
4. #include < stdio.h >

Answer 1

Correct Answer - Option 4 : #include < stdio.h >

The correct answer is option 4.

Explanation :

Option 1:

No error since assigning an integer value to a variable and value 17 is inside the range of integer i.e. -32768 to +32767.

Option 2:

No error since value 99 is ASCII value, hence whatever character has ASCII value 99 will be assigned to char c.

Option 3:

No error since float data type allows float typecasting.

Option 4:

• Generally, no error should occur in this header file but an error may occur in the following conditions :
•  Moving this header file to another drive (excluding the drive where TURBO C is installed) may cause an error since the compiler will find the header file in the drive where TURBO C is installed & throw a compilation error.
• C program with single header file #include<stdio.h> can throw error "undefined reference to main() function". 

Hence, the correct answer is "#include<stdio.h>".

NOTE: 

Option 4 is the correct answer in official ISRO paper