C <stdarg.h> - va_end
The C <stdarg.h> va_end macro performs cleanup for an instance of va_list type initialized by a call to va_start or va_copy.
If there is no corresponding call to va_start or va_copy, or if va_end is not called before a function that calls va_start or va_copy returns, the behavior is undefined.
Syntax
void va_end( va_list ap );
Parameters
ap |
Specify an instance of the va_list type to clean up. |
Return Value
None.
Example:
The example below shows the usage of va_end macro function.
#include <stdio.h>
#include <stdarg.h>
int add_nums(int count, ...) {
int result = 0;
va_list args;
va_start(args, count);
for (int i = 0; i < count; ++i) {
result += va_arg(args, int);
}
va_end(args);
return result;
}
int main () {
printf("Sum is: %d\n", add_nums (2, 10, 20));
printf("Sum is: %d\n", add_nums (3, 10, 20, 30));
printf("Sum is: %d\n", add_nums (4, 10, 20, 30, 40));
return 0;
}
The output of the above code will be:
Sum is: 30 Sum is: 60 Sum is: 100
❮ C <stdarg.h> Library
