#include <stdio.h>

#define SRCSHOW(msg, ...) \
                        printf( " %s : [%d]  "msg" \n",  __FILE__, __LINE__, ##__VA_ARGS__);


int main(void)
{
    float x= 0.5;
    float y=-7.8;
    float z = 22;
    /* provide integer as arguments */
    SRCSHOW("x=%s y=%g z= %g", "x", y, z );

    return 0;
}