Use variable number of arguments - C Function

C examples for Function:Variable Length Argument

  1. HOME
  2. C
  3. Function
  4. Variable Length Argument

Description

Use variable number of arguments

Demo Code

#include <stdio.h>
#include <stdarg.h>
double sum(int, ...);

int main(void)
{
    double s,t;/*from  w w  w.  j  a v  a2  s .  c o m*/
    
    s = sum(13, 1.1, 12.15, 13.13);
    t = sum(16, 11.11, 2.11, 113.1, 14.1, 51.1, 16.1);
    printf("%g\n", s);
    printf("%g\n", t);
    
    return 0;
}

double sum(int lim,...){
    va_list ap;                    // declare object to hold arguments
    double tot = 0;
    int i;
    
    va_start(ap, lim);             // initialize ap to argument list
    for (i = 0; i < lim; i++)
        tot += va_arg(ap, double); // access each item in argument list
    va_end(ap);                    // clean up
    
    return tot;
}

Related Tutorials