ExamAdept

There is a error in the below program. Which statement will you add to remove it?

#include<stdio.h>

int main()
{
    int a;
    a = f(10, 3.14);
    printf("%d\n", a);
    return 0;
}
float f(int aa, float bb)
{
    return ((float)aa + bb);
}

A:

Add prototype: float f(aa, bb)

B:

Add prototype: float f(int, float)

C:

Add prototype: float f(float, int)

D:

Add prototype: float f(bb, aa)

Answer: B

The correct form of function f prototype is float f(int, float);

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Which of the following statements are correct about the program?

#include<stdio.h>

int main()
{
    printf("%p\n", main());
    return 0;
}

A:

It prints garbage values infinitely

B:

Runs infinitely without printing anything

C:

Error: main() cannot be called inside printf()

D:

No Error and print nothing

Answer: B

In printf("%p\n", main()); it calls the main() function and then it repeats infinetly, untill stack overflow.

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Point out the error in the program

#include<stdio.h>

int main()
{
    int a=10;
    void f();
    a = f();
    printf("%d\n", a);
    return 0;
}
void f()
{
    printf("Hi");
}

A:

Error: Not allowed assignment

B:

Error: Doesn't print anything

C:

No error

D:

None of above

Answer: A

The function void f() is not visible to the compiler while going through main() function. So we have to declare this prototype void f(); before to main() function. This kind of error will not occur in modern compilers.

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Point out the error in the program

#include<stdio.h>
int f(int a)
{
  a > 20? return(10): return(20);
}
int main()
{
    int f(int);
    int b;
    b = f(20);
    printf("%d\n", b);
    return 0;
}

A:

Error: Prototype declaration

B:

No error

C:

Error: return statement cannot be used with conditional operators

D:

None of above

Answer: C

In a ternary operator, we cannot use the return statement. The ternary operator requires expressions but not code.

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Point out the error in the program


f(int a, int b)
{
    int a;
    a = 20;
    return a;
}

A:

Missing parenthesis in return statement

B:

The function should be defined as int f(int a, int b)

C:

Redeclaration of a

D:

None of above

Answer: C

f(int a, int b) The variable a is declared in the function argument statement.

int a; Here again we are declaring the variable a. Hence it shows the error "Redeclaration of a"

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Questions for: Functions