文本文件合并……..

Question

有两个文本文件1.txt和2.txt，要求把这两个文件中的信息合并，保存到一个新文件3.txt中。能详细解释一下吗，用c语言编写

Answer 1

用fopen打开文件，fread读取内容，然后fwrite写入新文件

#include <stdio.h>
#include <stdlib.h>
 
int main()
{
    FILE *fp1,*fp2,*fp3;
    char buf[10000] = {0};
    int sz = 0;
    fp1 = fopen("D:\\a.txt","r");
    fp2 = fopen("D:\\b.txt","r");
    fp3 = fopen("D:\\c.txt","w");
    sz = fread(buf,1,10000,fp1);
    fwrite(buf,1,sz,fp3);
    sz = fread(buf,1,10000,fp2);
    fwrite(buf,1,sz,fp3);
    fclose(fp1);
    fclose(fp2);
    fclose(fp3);
    return 0;
}