[Linux流操作]使用scanf函数读取数据

/*函数fscanf()示例*/
#include<stdio.h>
FILE* stream;
int main(int argc,char *argv[])
{
long l;
float fp;
char s[81];
char c;
if(argc != 2)
{
printf("文件参数错误！\n");
return 0;
}
stream = fopen(*(argv+1),"w+");
if(stream == NULL)
{
printf("打开文件失败!\n");
}
else
{
fprintf(stream,"%s %d %f %c","a_string",6500,3.1415,  'x');
fseek(stream,0L,SEEK_SET);      /*定位文件*/
fscanf(stream,"%s",s);          /*格式化*/
fscanf(stream,"%ld",&l);
fscanf(stream,"%f",&fp);
fscanf(stream," %c",&c);
printf("%s\n",s);
printf("%ld\n",l);
printf("%f\n",fp);
printf("%c\n",c);
fclose(stream);/*关闭*/
}
return 0;
}