一个用于读写PGM图像的小程序，展示了PGM文件的读写原理。 VC++ 6.0环境编译通过 -A PGM image to read and write small programs to demonstrate the principles of reading and writing PGM files. VC++ 6.0 compiler environment

include read and write gray image pgm type with mirror function in c-include read and write gray image pgm type with mirror function in c++