函式功能
函式名: vfprintf功 能: 送格式化輸出到一流中
用 法: int vfprintf(FILE *stream, char *format, va_list param);
程式示例
#include#include
#include
FILE *fp;
int vfpf(char *fmt, ...)
{
va_list argptr;
int cnt;
va_start(argptr, fmt);
cnt =vfprintf(fp, fmt, argptr);
va_end(argptr);
return(cnt);
}
int main(void)
{
int inumber = 30;
float fnumber = 90.0;
char string[4] = "abc";
fp = tmpfile();
if (fp == NULL)
{
perror("tmpfile() call");
exit(1);
}
vfpf("%d %f %s", inumber, fnumber, string);
rewind(fp);
fscanf(fp,"%d %f %s", &inumber, &fnumber, string);
printf("%d %f %s\n", inumber, fnumber, string);
fclose(fp);
return 0;
}
