#include <stdarg.h>

char buffer[];

int vspf(char *fmt, ...)

{

    va_list argptr;

    int cnt;

    va_start(argptr, fmt);

    cnt = vsprintf(buffer, fmt, argptr);

    va_end(argptr);

    return(cnt);

}

int main(void)

{

    int inumber = ;

    float fnumber = 90.0;

    char string[] = "abc";

    vspf("%d %f %s", inumber, fnumber, string);

    printf("%s\n", buffer);

}

 90.000000 abc