摘要：#include<stdio.h>#include<stdlib.h>#include<sys/wait.h>#define MAXLINE 4096int main(){ char buf[MAXLINE]; pid_t pid; int status; while(fgets(buf,MAXLINE,stdin) != NULL){ if(buf[strlen(buf) - 1] == '\n') buf[strlen(buf) - 1] = 0; if((pid = fork()) < 0){ ... 阅读全文

摘要：#include<stdio.h>#include<stdlib.h>#include<dirent.h>int main(int argc,char **argv){ DIR *dp; struct dirent *dirp; if(argc != 2){ printf("usage:ls directory_name\n"); exit(0); } if((dp = opendir(argv[1])) == NULL){ printf("can not open\n"); exit(0); ... 阅读全文

摘要：clock（）函数的头文件是time.h,基本结构如下：clock_t start,stop;start = clock();{要计时区域}stop = clock();printf（“time is %f”，（float)(stop - start)/CLOCKS_PER_SEC）;其中CLOCKS_PER_SEC是系统常量，表示系统时钟滴答数。 阅读全文

摘要：添加-Xcompiler-fopenmp 选项。 阅读全文