C Programming - Complicated Declarations

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Exercise

"When ambition ends, happiness begins."

- (Proverb)

Point out the error in the following program (in Turbo C under DOS).

#include<stdio.h>

union emp
{
    int empno;
    int age;
};

int main()
{
    union emp e = {10, 25};
    printf("%d %d", e.empno, e.age);
    return 0;
}

A.	Error: Lvalue required
B.	Error: Rvalue required
C.	Error: cannot initialize more than one union member.
D.	No error

Point out the error in the following program.

#include<stdio.h>
#include<stdlib.h>

int main()
{
    static char *p = (char *)malloc(10);
    return 0;
}

A.	Error: Lvalue required
B.	Error: Rvalue required
C.	Error: invalid *p declaration
D.	No error

Point out the error in the following program.

#include<stdio.h>
void display(int (*ff)());

int main()
{
    int show();
    int (*f)();
    f = show;
    display(f);
    return 0;
}
void display(int (*ff)())
{
    (*ff)();
}
int show()
{
    printf("IndiaBIX");
}

A.	Error: invalid parameter in function display()
B.	Error: invalid function call f=show;
C.	No error and prints "IndiaBIX"
D.	No error and prints nothing.