矩阵乘法的实现

废话不说，直接看代码：

#include "matrix.h"


int matmul(int* mat1, int width1, int height1, int* mat2, int width2, int height2, int* mat3) {

	int* m1 = mat1;
	int* m2 = mat2;
	int* m3 = mat3;

	int n = 0;
	for (int i = 0; i < height1; i++) {


		for (int m = 0; m < width2; m++) {
			int tmp = 0;

			int k = m;
			for (int j = i * width1; j < i * width1 + width1; j++) {

				tmp += m1[j] * m2[k];

				k += width2;
			}

			m3[n] = tmp;
			n++;
		}

	}
	return 0;
}