1 #include<stdio.h>
 2 #include<stdlib.h>
 3 #define MAX 200
 4 int main(void){
 5     FILE*a,*b;
 6     char c[MAX];
 7     char filename1[20],filename2[20];
 8     scanf("%s %s",filename1,filename2);
 9     a=fopen(filename1,"r");
10     b=fopen(filename2,"w");
11     if(a==NULL){
12         printf("%s",filename1);
13         perror("open  fail\n");
14         exit(0);
15     }
16     else if(b==NULL){
17         printf("open %s fail\n",filename2);
18         exit(0);
19     }
20     while(fgets(c,MAX,a)!=NULL){
21         fputs(c,b);
22     }
23     system("pause");
24     return 0;
25 }