这个问题属于非常初级的问题,但是对于初学不知道的人可能会比较头疼。C++ 中函数是不能直接返回一个数组的,但是数组其实就是指针,所以可以让函数返回指针来实现。比如一个矩阵相乘的函数,很容易地我们就写成:
实例
#include <iostream>
using namespace std;
float* MultMatrix(float A[4], float B[4])
{
float M[4];
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];
return M;
}
int main()
{
float A[4] = { 1.75, 0.66, 0, 1.75 };
float B[4] = {1, 1, 0, 0};
float *M = MultMatrix(A, B);
cout << M[0] << " " << M[1] << endl;
cout << M[2] << " " << M[3] << endl;
return 0;
}
using namespace std;
float* MultMatrix(float A[4], float B[4])
{
float M[4];
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];
return M;
}
int main()
{
float A[4] = { 1.75, 0.66, 0, 1.75 };
float B[4] = {1, 1, 0, 0};
float *M = MultMatrix(A, B);
cout << M[0] << " " << M[1] << endl;
cout << M[2] << " " << M[3] << endl;
return 0;
}
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