【C++】数学处理函数

数学运算

#include <cmath>

• cos(): 返回弧度角余弦double cos(double)
• sin(): 返回弧度角正弦double sin(double)
• tan(): 返回弧度角正切double tan(double)
• log(): 返回自然对数double log(double)
• pow(): 返回x的y次方double pow(double x, double y)
• hypot(): 返回平方和开方double hypot(double, double)
• sqrt(): 返回平方根double sqrt(double)
• abs(): 返回整数绝对值int abs(int)
• fabs(): 返回浮点数绝对值double fabs(double)
• floor(): 向下取整double floor(double)

随机数

#include <iostream>
#include <ctime>
#include <cstdlib>
suing namespace std;
int main()
{
    srand((unsigned)time(NULL));
    cout << "随机数" << rand() << endl;
    return 0;
}