1.将A.txt文件中的内容复制到C.txt文件中

#include<stdio.h>
#include<stdlib.h>
int main() {
  FILE *p1,*p2;
  char ch;
  p1 = fopen("E:\\A.txt","r");
  if(!p1) {
    printf("open file fail");
    exit(0);
  }
  p2 = fopen("E:\\c.txt","w");
  if(!p2) {
    printf("open file fail");
    exit(0);
  }
  while(!feof(p1)){
    ch = fgetc(p1);
    fputc(ch,p2);
  }
  fclose(p1);
  fclose(p2);

}