C语言学习(36)

 1 //fprintf函数将数据按指定格式写入指定文件中,与printf函数相似
 2 //形式为 fprintf(文件指针,格式字符串,输出列表)
 3 #include<stdio.h>
 4 #include<stdlib.h>
 5 int main(){
 6     FILE *fp;
 7     int i=10,j=12;
 8     double m=1.5,n=2.345;
 9     char s[]="This is a string";
10     char c='\n';
11     if( (fp=fopen("file_data.txt","w"))==NULL ){
12         printf("打开文件失败\n");
13         exit(0);
14     }
15     fprintf(fp,"%s%c",s,c);
16     fprintf(fp,"%d %d\n",i,j);
17     fprintf(fp,"%lf %lf\n",m,n);
18     fclose(fp);
19     return 0;
20 }