就是一个文件的读写问题啊。include<stdio.h> int main(int argc, char **argv){ int rfd = -1, wfd = -1;char buf[1024] = {0};int n;if(argc != 3){ printf("Usage: ./test infile outfile\n");return -1;} rfd = open(argv[1], O_RDONLY);wfd = open(argv[2], O...