常用函数和STL

#include <bits/stdc++.h>

using namespace std;
#define PI acos(-1.0)
int main()
{
    printf("%f\n",asin(0.5));//求反正弦
    printf("%f\n",sin(*PI/180.0));//求正弦
    printf("%f\n",exp());//求e^x
    printf("%f\n",log(exp()));//求以e为底的自然对数
    printf("%f\n",sqrt());//求根
    printf("%f\n",pow(,exp()));//求幂
}