二进制文件拷贝

/*文件操作要求：将文件 in.exe 复制为名为 out.exe文件请在int main（）函数里面编辑*/#include <stdio.h>#include <stdlib.h>#include <string.h>int filesize(FILE *stream);void BinaryFileCopy(const char * src_file_name, const char * dst_file_name);int main(){char *src_file_name = "Unnamed.gif";char *dst_file_name = "Unnamed2.gif";BinaryFileCopy(src_file_name, dst_file_name);return 0;}void BinaryFileCopy(const char * src_file_name, const char * dst_file_name){const int kBufSize = 1024;char buf[kBufSize];FILE *src_fp = fopen(src_file_name, "rb");if (src_fp == NULL) {printf("src file open error/n");exit(1);}FILE *dst_fp = fopen(dst_file_name, "wb+");if (dst_fp == NULL) {printf("dst file open error/n");exit(1);}int n;while (!feof(src_fp) && (n=fread(buf, 1, kBufSize, src_fp)) > 0) {fwrite(buf, 1, n, dst_fp);}fclose(src_fp);fclose(dst_fp);}int filesize(FILE *stream){int curpos, length;curpos = ftell(stream);fseek(stream, 0L, SEEK_END);length = ftell(stream);fseek(stream, curpos, SEEK_SET);return length;}