标准I/O小程序-文件拷贝

#include <stdio.h>
#include <string.h>/**
*
*       ./mycopy src des
*/
int main(int argc, char *argv[])
{FILE *des, *src;char buf[128];int ret, i, j, count;if (argc < 3) {printf("The argc is wrong!\n");return -1;}src = fopen(argv[1], "r");if (src == NULL) {printf("fopen %s fail.\n", argv[1]);return -1;}des = fopen(argv[2], "w+");if (des == NULL) {printf("fopen %s fail.\n", argv[2]);fclose(src);return -1;}i = 0;j = 0;while ((count = fread(buf, 1, 128, src)) > 0) {i++;j+=strlen(buf);fwrite(buf, 1, count, des);if (count < 128) {printf("fwrite over.\n");break;}}printf("i=%d\n", i);printf("j=%d\n", j);fseek(src, 0, SEEK_END);printf("src long:%ld\n", ftell(src));fseek(des, 0, SEEK_END);printf("des long:%ld\n", ftell(des));fclose(src);fclose(des);return 0;
}