巧用vsprintf将浮点数等转化字符串

#include <stdarg.h>

char buffer[80];

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 = 30;

    float fnumber = 90.0;

    char string[4] = "abc";


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

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

}

30 90.000000 abc