1 #include <stdio.h>
2 #include <stdlib.h>
3
4 int main(int argc, char *argv[])
5 {
6 if(argc == 2)//将文件中的打印到标准输出
7 {
8 FILE *fp;
9 if( !(fp = fopen( argv[1], "r" )) )
10 {
11 fprintf(stderr,"cannot open file %s.",argv[1]);
12 exit(-1);
13 }
14 int c;
15 while( (c = fgetc(fp) ) != EOF )
16 {
17 fputc(c,stdout);
18 }
19 fclose(fp);
20 }
21 else if( argc == 3)
22 {
23 FILE *src ;
24 FILE *dest;
25 if( !( src = fopen( argv[1], "r" ) ) )
26 {
27 fprintf(stderr, "%s: cannot open file %s\n", argv[0],argv[1]);
28 exit(-1);
29 }
30 if( !( dest = fopen( argv[2], "w+" ) ) )
31 {
32 fprintf(stderr, "%s: cannot open file %s\n", argv[0],argv[1]);
33 exit(-1);
34 }
35 int c;
36 while( (c = fgetc(src))!=EOF)
37 {
38 fputc(c,dest);
39 }
40 fclose(src);
41 fclose(dest);
42 }
43 return 0;
44 }
