C++读取与保持图片

 #include<iostream>

 using namespace std;

 void main(void)
 {
     //保存输入图像文件名和输出图像文件名
     ];
     ];
     //图像数据长度
     int length;
     //文件指针
     FILE* fp;
     //输入要读取的图像名
     cout << "Enter Image name:";
     cin >> InImgName;
     //以二进制方式打开图像
     if ((fp = fopen(InImgName, "rb")) == NULL)
     {
         cout << "Open image failed!" << endl;
         exit();
     }
     //获取图像数据总长度
     fseek(fp, , SEEK_END);
     length = ftell(fp);
     rewind(fp);
     //根据图像数据长度分配内存buffer
     char* ImgBuffer = (char*)malloc(length* sizeof(char));
     //将图像数据读入buffer
     fread(ImgBuffer, length, , fp);
     fclose(fp);
     //输入要保存的文件名
     cout << "Enter the name you wanna to save:";
     cin >> OutImgName;
     //以二进制写入方式
     if ((fp = fopen(OutImgName, "wb")) == NULL)
     {
         cout << "Open File failed!" << endl;
         exit();
     }
     //从buffer中写数据到fp指向的文件中
     fwrite(ImgBuffer, length, , fp);
     cout << "Done!" << endl;
     //关闭文件指针，释放buffer内存
     fclose(fp);
     free(ImgBuffer);
 }

C++语言读取和保存单张图片的代码