[代码实例][C语言]复制文件

#include <stdio.h>
#include <stdlib.h>

#define BUF_SIZE    1024
char buf[BUF_SIZE + 1];

int main(int argc, char * argv[])
{
    if(argc != 3)
    {
        printf("Usage : %s <src_file> <dest_file>\n", argv[0]);
        return EXIT_FAILURE;
    }

    FILE * in_fp;
    FILE * out_fp;
    char * in_file_name = argv[1];
    char * out_file_name = argv[2];
    size_t count;

    if((in_fp = fopen(in_file_name, "rb")) == NULL)
    {
        perror("fopen");
        return EXIT_SUCCESS;
    }

    if((out_fp = fopen(out_file_name, "wb+")) == NULL)
    {
        perror("fopen");
        return EXIT_SUCCESS;
    }

    while((count = fread(buf, 1, BUF_SIZE, in_fp)) > 0)
    {
        if(fwrite(buf, 1, count, out_fp) != count)
        {
            perror("fwrite");
            return EXIT_FAILURE;
        }
    }

    if(fclose(in_fp) != 0)
    {
        perror("fclose");
        return EXIT_FAILURE;
    }
    if(fclose(out_fp) != 0)
    {
        perror("fclose");
        return EXIT_FAILURE;
    }

    return EXIT_SUCCESS;
}