在C++中,可以使用嵌套循环来实现矩阵乘法。以下是一个示例代码:
#include <iostream>
#include <vector>
using namespace std;
vector<vector<int>> matrixMultiply(vector<vector<int>>& mat1, vector<vector<int>>& mat2) {
int rows1 = mat1.size();
int cols1 = mat1[0].size();
int cols2 = mat2[0].size();
vector<vector<int>> result(rows1, vector<int>(cols2, 0));
for (int i = 0; i < rows1; i++) {
for (int j = 0; j < cols2; j++) {
for (int k = 0; k < cols1; k++) {
result[i][j] += mat1[i][k] * mat2[k][j];
}
}
}
return result;
}
int main() {
vector<vector<int>> mat1 = {{1, 2, 3}, {4, 5, 6}};
vector<vector<int>> mat2 = {{7, 8}, {9, 10}, {11, 12}};
vector<vector<int>> result = matrixMultiply(mat1, mat2);
for (int i = 0; i < result.size(); i++) {
for (int j = 0; j < result[0].size(); j++) {
cout << result[i][j] << " ";
}
cout << endl;
}
return 0;
}
在这个示例中,我们首先定义了一个函数matrixMultiply
,该函数接受两个矩阵作为参数,并返回它们的乘积矩阵。然后在main
函数中创建两个矩阵mat1
和mat2
,调用matrixMultiply
函数进行矩阵乘法运算,并打印结果。