include <stdio.h> void main(){FILE *fp;int a[10]={1,2,3},i,n;fp=fopen("dl.dat","w");//打开这个文件以写的方式 for(i=0;i<3;i++) fprintf(fp,"%d",a[i]);//把123依次写入这个文件 fprintf(fp,"\n"); fclose(fp);//把这个文件写入磁盘，并且关闭文件 fp=fopen("...
include <string.h> int main(){ FILE *fp;char str1[30],str2[30],str3[40],t;int i,j,k;//有改动 if((fp = fopen("A.txt","r")) == NULL){ printf("error");exit(0);} fgets(str1,10,fp);puts(str1);fclose(fp);if((fp = fopen("B.txt","r")) == NULL){...
include <stdio.h>int main(){FILE *fp;char filename[100]; //文件名 char tempstr[1024]; //读文件的缓冲 printf("请输入你要打开的文件名及路径，如c:\\temp.txt\n");gets(filename); //这句要用户输入文件名 if ((fp=fopen(filename,"r"))==NULL){//打开文件，并判断是否...
include <stdio.h> main(){ FILE *fp;int space=0;char str[81];fp=fopen("filename.txt","rb");while(1){ fgets(str,80,fp);if(feof(fp))break;if((str[0]=='\r')&&(str[1]=='\n'))space++;} fclose(fp);printf("\n In file have %d space line.",space);getch();...
include<stdio.h> #include<stdlib.h> int main() { int ch; FILE *fp; //FILE是一个结构体，定义在stdio.h中 char fname[50]; printf( "Enter the name of the file:" ); scanf( "%s", fname); fp = fopen( fname, "r" ); //以只读方式打开文件,f...
include <stdio.h> void main(){ int i;FILE *FP1;struct sryear2 { char md1[20];}sryear3[5];FP1=fopen("sryear2.txt","w");for (i=0;i<5;i++) /*为什么一次两个输出*/ { printf(" 恭喜!你答对了!");scanf("%s",sryear3[i].md1);// 用%s } } include...
程序如下:include<stdio.h> include<stdlib.h> main(){ FILE *fp;char ch,filename[20];printf("请输入文件的路径：\n");gets(filename);fp=fopen(filename,"r+");while(!feof(fp)){ ch=fgetc(fp);if(ch>='A'&&ch<='Z'){ ch=ch+32;fseek(fp,-1L,1);fputc(ch,fp);fseek(...
include<stdio.h>int main(){FILE *fp;char str[255];fp=fopen("file1.txt","r");if(fp==NULL)return 1;while(fgets(str,255,fp))printf(str);fclose(fp); return 0; }
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);retur...
c语言读写文件程序：include "stdio.h"include <stdlib.h>main(){ FILE *fp1;//定义文件流指针，用于打开读取的文件 FILE *fp2;//定义文件流指针，用于打开写操作的文件 char text[1024];//定义一个字符串数组，用于存储读取的字符 fp1 = fopen("d:\\a.txt","r");//只读方式打开文件a....