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c的时间函数算效率
2022-06-27 07:35:00 【＃math.h】
#include<time.h>
clock_t t;
t=clock()-t;//求时间差
printf("用时：%lf秒\n",((float)t)/CLOCKS_PER_SEC); //转换成秒单位
// CLOCKS_PER_SEC 一秒包含的毫秒数
log10(n)/log10(2) //log2(n)
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