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;
}