Structures Unions Enums

Point out the error in the program?

#include<stdio.h>

int main()
{
    struct a
    {
        float category:5;
        char scheme:4;
    };
    printf("size=%d", sizeof(struct a));
    return 0;
}

A:

Error: invalid structure member in printf

B:

Error in this float category:5; statement

C:

No error

D:

None of above

Answer: B

Bit field type must be signed int or unsigned int.

The char type: char scheme:4; is also a valid statement.

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Point out the error in the program?

typedef struct data mystruct;
struct data
{
    int x;
    mystruct *b;
};

A:

Error: in structure declaration

B:

Linker Error

C:

No Error

D:

None of above

Answer: C

Here the type name mystruct is known at the point of declaring the structure, as it is already defined.

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Point out the error in the program?

struct emp
{
    int ecode;
    struct emp *e;
};

A:

Error: in structure declaration

B:

Linker Error

C:

No Error

D:

None of above

Answer: C

This type of declaration is called as self-referential structure. Here *e is pointer to a struct emp.

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What will be the output of the program given below in 16-bit platform ?

#include<stdio.h>

int main()
{
    enum value{VAL1=0, VAL2, VAL3, VAL4, VAL5} var;
    printf("%d\n", sizeof(var));
    return 0;
}

A:

1

B:

2

C:

4

D:

10

Answer: B

No answer description is available. Let's discuss.

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What will be the output of the program ?

#include<stdio.h>

    struct course
    {
        int courseno;
        char coursename[25];
    };
int main()
{
    struct course c[] = { {102, "Java"}, 
                          {103, "PHP"}, 
                          {104, "DotNet"}     };

    printf("%d ", c[1].courseno);
    printf("%s\n", (*(c+2)).coursename);
    return 0;
}

A:

103 DotNet

B:

102 Java

C:

103 PHP

D:

104 DotNet

Answer: A

No answer description is available. Let's discuss.

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Questions for: Structures Unions Enums