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- Question
Point out the error in the program?
#include<stdio.h> int main() { struct emp { char name[25]; int age; float bs; }; struct emp e; e.name = "Suresh"; e.age = 25; printf("%s %d\n", e.name, e.age); return 0; }
Options- A. Error: Lvalue required/incompatible types in assignment
- B. Error: invalid constant expression
- C. Error: Rvalue required
- D. No error, Output: Suresh 25
- Correct Answer
- Error: Lvalue required/incompatible types in assignment
ExplanationWe cannot assign a string to a struct variable like e.name = "Suresh"; in C.We have to use strcpy(char *dest, const char *source) function to assign a string.
Ex: strcpy(e.name, "Suresh");
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- 1. Point out the error in the program?
#include<stdio.h> int main() { struct emp { char n[20]; int age; }; struct emp e1 = {"Dravid", 23}; struct emp e2 = e1; if(e1 == e2) printf("The structure are equal"); return 0; }
Options- A. Prints: The structure are equal
- B. Error: Structure cannot be compared using '=='
- C. No output
- D. None of above Discuss
Correct Answer: Error: Structure cannot be compared using '=='
- 2. Point out the error in the program?
#include<stdio.h> int 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); return 0; }
Options- A. Error: invalid structure member
- B. Error: Floating point formats not linked
- C. No error
- D. None of above Discuss
Correct Answer: Error: Floating point formats not linked
Explanation:
At run time it will show an error then program will be terminated.Sample output: Turbo C (Windows)
c:\>myprogram Sample 12.123 scanf : floating point formats not linked Abnormal program termination- 3. Point out the error in the program?
#include<stdio.h> int main() { struct bits { float f:2; }bit; printf("%d\n", sizeof(bit)); return 0; }
Options- A. 4
- B. 2
- C. Error: cannot set bit field for float
- D. Error: Invalid member access in structure Discuss
Correct Answer: Error: cannot set bit field for float
- 4. Point out the error in the program?
#include<stdio.h> int main() { union a { int i; char ch[2]; }; union a z1 = {512}; union a z2 = {0, 2}; return 0; }
Options- A. Error: invalid union declaration
- B. Error: in Initializing z2
- C. No error
- D. None of above Discuss
Correct Answer: Error: in Initializing z2
- 5. Point out the error in the program?
struct emp { int ecode; struct emp e; };
Options- A. Error: in structure declaration
- B. Linker Error
- C. No Error
- D. None of above Discuss
Correct Answer: Error: in structure declaration
Explanation:
The structure emp contains a member e of the same type.(i.e) struct emp. At this stage compiler does not know the size of sttructure.- 6. Point out the error in the program?
struct emp { int ecode; struct emp *e; };
Options- A. Error: in structure declaration
- B. Linker Error
- C. No Error
- D. None of above Discuss
Correct Answer: No Error
Explanation:
This type of declaration is called as self-referential structure. Here *e is pointer to a struct emp.- 7. 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; }
Options- A. Error: invalid structure member in printf
- B. Error in this float category:5; statement
- C. No error
- D. None of above Discuss
Correct Answer: Error in this float category:5; statement
Explanation:
Bit field type must be signed int or unsigned int.The char type: char scheme:4; is also a valid statement.
- 8. Point out the error in the program?
#include<stdio.h> #include<string.h> void modify(struct emp*); struct emp { char name[20]; int age; }; int main() { struct emp e = {"Sanjay", 35}; modify(&e); printf("%s %d", e.name, e.age); return 0; } void modify(struct emp *p) { p ->age=p->age+2; }
Options- A. Error: in structure
- B. Error: in prototype declaration unknown struct emp
- C. No error
- D. None of above Discuss
Correct Answer: Error: in prototype declaration unknown struct emp
Explanation:
The struct emp is mentioned in the prototype of the function modify() before declaring the structure.To solve this problem declare struct emp before the modify() prototype.- 9. Point out the error in the program in 16-bit platform?
#include<stdio.h> int main() { struct bits { int i:40; }bit; printf("%d\n", sizeof(bit)); return 0; }
Options- A. 4
- B. 2
- C. Error: Bit field too large
- D. Error: Invalid member access in structure Discuss
Correct Answer: Error: Bit field too large
- 10. Nested unions are allowed
Options- A. True
- B. False Discuss
Correct Answer: True
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