close
第一種方式:
#include<ctime>
srand(time(0))
int time1,time2;
time1 = time(0); //start program time
//execute the program
Time2 = time(0); //finish program time
Cout<<time2-time1<<” seconds ”<<endl;
第二種方式:
clock_t start, end, diff_time;
start = clock();//開始時間
//execute the program
end = clock();//結束時間
diff_time =(double) (end-start)/(double)CLOCKS_PER_SEC;//秒數
cout<<endl<<"Time: "<<diff_time<<" seconds "<<endl;
在多工系統下測試不準,因為同時間OS會處理其他process
用來比較2個programs的效能
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