编程基本功——C标准文件的读写操作示例

源码

#include <stdio.h>

#include <string.h>

int main()

{

 FILE *fp;

 char pathname[20], txt1[20]={'\0'}, txt2[20]={'\0'};

 int nFileLen;

 printf("please input the path name of the file\n");

 scanf("%s", pathname);

 fp = fopen(pathname, "w");

 printf("please input a string to this file\n");

 scanf("%s", txt1);

 nFileLen = strlen(txt1);

 fwrite(txt1, nFileLen, 1, fp);

 fclose(fp);

 printf("The file has been saved\n");

 printf("The content of the file: %s is \n", pathname);

 fp = fopen(pathname, "r");

 fread(txt2, nFileLen, 1, fp);

 printf("%s\n", txt2);

 fclose(fp);

 return 0;

}