文件的操作步骤：
#include <stdio.h> #include <stdlib.h> int main()
{
FILE *fp;
int i, d;
fp=fopen("data.txt","w");
if(fp==NULL)
{
printf("File cannot open! " );
exit(0);
}
for(i=0; i<10; i++)
{
scanf("%d", &d);
fprintf(fp,"%d\t", d);
}
fclose(fp);
return 0;
}
格式化输出：
#include <stdio.h> #include <stdlib.h> int main()
{
FILE *fp;
int i, No;
float salary;
fp=fopen("data.csv","w");
if(fp==NULL)
{
printf("File cannot open! " );
exit(0);
}
//输入5名员工的工号，并保存到文件中
for(i=0; i<5; i++)
{
scanf("%d %f", &No, &salary);
fprintf(fp,"%d, %.2f\n", No, salary);
}
fclose(fp);
return 0;
}
扩展资料：
从文件中读取字符：
#include <stdio.h> #include <stdlib.h> int main()
{
FILE *fp;
char c;
if ((fp=fopen( "data.dat" , "r" ))==NULL)
{
printf("File cannot open!");
exit(0);
}
while((c=fgetc(fp))!=EOF)
putchar(c);
fclose(fp);
return 0;
}
参考资料：
详情就等等吧……在吃午餐
如：
#include<stdio.h>
main(){
FILE *fpt;
fpt = fopen("wendangming.txt","w");//打开文档，写入
fprintf(fpt,"Hello world");
fclose(fpt);
}
FILE *fpt;
char a[]="hello world!";
fpt = fopen("wendangming.txt","w");//打开文档，写入
fprintf(fpt,"%s",a);
fclose(fpt);
}本回答被提问者采纳