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#include <stdio.h>#include <stdarg.h>int doCallVaArg( int nArgCount, ... ){    va_list argList;    int nSum = 0;    va_start( argList, nArgCount );    for( ;nArgCount > 0; --nArgCount )    {        nSum += va_arg( argList, int );     }    return nSum;}int main( int argc, char ** argv ){    int nSum = doCallVaArg( 5, 1, 2, 3, 4, 5 );    printf( "Sum is %d\n", nSum );    return 0;}