Question

How to use a function with dynamic number of argument until zero with va_arg() in C

Answer 1

#include <stdio.h>
#include <stdarg.h>

void PrintNumbers(int startnum, ...) {
    int count = 0;
    int n = startnum;
    
    va_list vl;
    va_start(vl, startnum);

    while (n != 0) {
        printf("%d\n", n);
        n = va_arg(vl, int);
    }

    va_end(vl);
}

int main(void)
{
    PrintNumbers(1, 2, 3, 4, 5, 0);

    return 0;
}



/*
run:

1
2
3
4
5

*/

 

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