#include <iostream>
#include <ctime>

using namespace std;
int *getRandom();
int main(){
    int *p = NULL;
    p = getRandom();
//    c++不支持函数外返回局部变量的地址，除非为static变量
    for (int i = 0; i < 10; ++i) {
         cout<<p+i<<"----"<<"*p = "<<*(p+i)<<endl;
    }


    return 0;
}

int *getRandom(){

    static int r[10] = {0};
    srand((unsigned )time(NULL));
    for (int i= 0; i <10 ; ++i) {
        r[i] = i;

    }
    return r;

}

#include <iostream>
using namespace std;

void Matrix(float M[4], float A[4], float B[4])
{
    /*
     * 矩阵运算
     */
    
    M[0] = A[0]*B[0] + A[1]*B[2];
    M[1] = A[0]*B[1] + A[1]*B[3];
    M[2] = A[2]*B[0] + A[3]*B[2];
    M[3] = A[2]*B[1] + A[3]*B[3];

    cout << M[0] << " " << M[1] << endl;
    cout << M[2] << " " << M[3] << endl;
}

int main()
{
    float A[4] = { 1.75, 0.66, 2, 1.23 };
    float B[4] = {1, 1, 0, 0};
// 声明数组
    float *M = new float[4];
    Matrix(M, A, B);

    cout << M[0] << " " << M[1] << endl;
    cout << M[2] << " " << M[3] << endl;
//    删除数组
    delete[] M;

    return 0;
}