Variable Number of Arguments - Point Out Errors | Multiple Questions and Answers

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Variable Number of Arguments - Point Out Errors Multiple Questions and Answers.

1.	Point out the error in the program?
	`#include<stdio.h> #include<stdarg.h> fun(...); int main() { fun(3, 7, -11.2, 0.66); return 0; } fun(...) { va_list ptr; int num; va_start(ptr, n); num = va_arg(ptr, int); printf("%d", num); }`
	A.	Error: fun() needs return type
	B.	Error: ptr Lvalue required
	C.	Error: Invalid declaration of fun(...)
	D.	No Error

2.	Point out the error if any in the following program (Turbo C)?
	`#include<stdio.h> #include<stdarg.h> void display(int num, ...); int main() { display(4, 'A', 'a', 'b', 'c'); return 0; } void display(int num, ...) { char c; int j; va_list ptr; va_start(ptr, num); for(j=1; j<=num; j++) { c = va_arg(ptr, char); printf("%c", c); } }`
	A.	Error: unknown variable ptr
	B.	Error: Lvalue required for parameter
	C.	No error and print A a b c
	D.	No error and print 4 A a b c

3.	Point out the error in the program?
	`#include<stdio.h> #include<stdarg.h> void varfun(int n, ...); int main() { varfun(3, 7, -11, 0); return 0; } void varfun(int n, ...) { va_list ptr; int num; num = va_arg(ptr, int); printf("%d", num); }`
	A.	Error: ptr has to be set at begining
	B.	Error: ptr must be type of va_list
	C.	Error: invalid access to list member
	D.	No Error

4.	Point out the error in the program?
	`#include<stdio.h> #include<stdarg.h> int main() { void display(char s, int num1, int num2, ...); display("Hello", 4, 2, 12.5, 13.5, 14.5, 44.0); return 0; } void display(char s, int num1, int num2, ...) { double c; char s; va_list ptr; va_start(ptr, s); c = va_arg(ptr, double); printf("%f", c); }`
	A.	Error: invalid arguments in function display()
	B.	Error: too many parameters
	C.	Error: in va_start(ptr, s);
	D.	No error

5.	Point out the error in the program?
	`#include<stdio.h> #include<stdarg.h> int main() { void display(int num, ...); display(4, 12.5, 13.5, 14.5, 44.3); return 0; } void display(int num, ...) { float c; int j; va_list ptr; va_start(ptr, num); for(j=1; j<=num; j++) { c = va_arg(ptr, float); printf("%f", c); } }`
	A.	Error: invalid va_list declaration
	B.	Error: var c data type mismatch
	C.	No error
	D.	No error and Nothing will print

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