标准IO实现文件拷贝实例三

#include

#define BUFF 50

int main(int argc, char *argv[])
{
 FILE *fpr, *fpw;
 int realsize;
 char buf[BUFF];

 if (argc != 3)
 {
  printf("argument is error\n");
  
  return -1;
 }

 if ((fpr = fopen(argv[1], "r")) == NULL)
 {
  printf("open source is error\n");
  return -1;
 }

 if ((fpw = fopen(argv[2], "w")) == NULL)
 {
  printf("open target is error\n");
  return -1;
 }

 while ((realsize = fread(buf, sizeof(char), BUFF, fpr)) > 0)
 {
  fwrite(buf, sizeof(char), realsize, fpw);
 }

 return 0;
}