#include<sys/times.h>#include<stdio.h>#include<errno.h>#include<stdlib.h>#include<unistd.h>//时间统计函数staticvoidget_times(clock_treal,structtms*tmsstart,structtms*tmsend){staticlongclktck=0;if(clktck==0)//第一次获得时间if((clktck=sysconf(_SC_CLK_TCK))<0){perror("调用sysconf函数错误.\n");}//以下为时间输出printf("时钟时间:%7.2f\n",real/(double)clktck);printf("用户CPU时间:%7.2f\n",(tmsend->tms_utime-tmsstart->tms_utime)/(double)clktck);printf("系统CPU时间:%7.2f\n",(tmsend->tms_stime-tmsstart->tms_stime)/(double)clktck);printf("子进程时钟时间:%7.2f\n",(tmsend->tms_cutime-tmsstart->tms_cutime)/(double)clktck);printf("子进程系统CPU时间:%7.2f\n",(tmsend->tms_cstime-tmsstart->tms_cstime)/(double)clktck);}//执行并且对cmd命令计时staticvoidexecute_cmd(char*cmd){structtmstmsstart,tmsend;//时间结构体;clock_tstart,end;//分别存放起始和停止时刻的时钟滴答数intstatus;//执行状态printf("\n当前执行的命令是:%s\n",cmd);//输出对应的命令if((start=times(&tmsstart))==-1)//获得start时间{perror("调用times函数出错.\n");}if((status=system(cmd))<0)//执行命令{perror("调用system函数出错\n");}if((end=times(&tmsend))==-1)//获得end时间{perror("调用times函数出错\n");}get_times(end-start,&tmsstart,&tmsend);//计算运行时间}//主函数intmain(intargc,char*argv[]){inti;setbuf(stdout,NULL);//清空标准输出（屏幕）if(argc!=2)//参数数目错误{printf("请输入正确的命令.\n");exit(0);}else{execute_cmd(argv[1]);//执行命令exit(0);}}