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- Question
There is a mistake in the following code. Add a statement in it to remove it. main() { int a; a = f (10, 3.14) ; printf ( " %d ", a ); } f (int aa, float bb) { return ( ( float ) aa + bb ); }
- Correct Answer
- Add the following function prototype in main (): float f ( int, float );
- 1. What would be the output of the following program? main() { float a = 0.7; if ( a < 0.7f ) printf ( " C "); else Printf ( " C++ "); } Discuss
- 2. What would be the output of the following program? main() { printf (" %d%d%d ", sizeof (3.14f), sizeof (3.14), sizeof (3. 141); } Discuss
- 3. Which error are you likely to get when you run the following program? main() { struct emp { char name[20]; float sal; }; struct emp e[10]; int i; for ( i = 0 ; i <= 9; i++) scanf ( "%s %f" , e[i].name, &e[i].sal ); } Discuss
- 4. In the following code in which order the functions would be called? a = ( f1 ( 23,14 ) * f2 ( 12/4) ) + f3() ; Discuss
- 5. What would be the output of the following program? main() { int i=2 ; printf ("\n%d%d", ++i, ++i ); } Discuss
- 6. Point out the error, if any, in the following program. main() { int a = 10; void f(); a = f(); printf ( "\n %d", a ); } void f() { printf ( "\n Hi "); } Discuss
- 7. Will the following function work? f1 ( int a, int b ) { return ( f2 (20) ); } f2 ( int a ) { return ( a * a ); } Discuss
- 8. Indicate what would the SWAP macro be expanded to on preprocessing. Would the code compile? #define SWAP (a, b, c ) (c t; t = a, a = b, b = t; ) main() { int x = 10, y = 20; SWAP (x, y, int ); printf ( " %d%d ", x, y); } Discuss
- 9. What would be the output of the following program assuming that the array beigns at location 1002? main() { int a[3][4] = { 1 , 2 , 3 , 4 5, 6 , 7, 8 9, 10 , 11, 12 }; Printf ("\n%u %u %u", a[0] + 1, *( a[0] + 1), *( *(a + 0) + 1) ); } Discuss
- 10. Undefined reference to 'pthread_create' How to Fix this error? Discuss
Programming problems
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Correct Answer: The order may vary from compiler to compiler Here the multiplication will happen before the addition , but in which order the functions would be called is undefined In an arithmetic expression the parentheses tell the compiler which operands go with which operators but do not force the compiler to evaluate everything within the parentheses first
Correct Answer: Output may vary from compiler to compiler The order of evaluation of the arguments to a function call is unspecified
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Correct Answer: Yes
Correct Answer: ( int t ; t = a, a = b, b = t ;); This code won't compile since declaration of t cannot occur within parentheses
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Correct Answer: This is a common error while compiling C program in Linux This error occurs when you are using pthread_create function to create threads in your programs To fix this problem ensure following points: Include header file pthreadh in your program Add ?lpthread linker flag with compilation command 1- Include Header file #include
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