如果两个矩阵A和B，符合条件A为一个m*n的矩阵，B为一个n*p的矩阵，则两个矩阵可以相乘，A*B的结果为一个m*p的矩阵C。
C11 = A11*B11+A12*B21+......+A1n*Bn1
.
.
.
C1p = A11*B1p+A12*2p+......+A1n*Bnp
.
.
.
Cnp = Am1*B1p+Am2*B2p+......+Amn*Bnp
#include <iostream> using namespace std; int fnMatrixMultriply(const int*,const int*,int*,const int,const int,const int); int main() { int m,n,p; int i,j; cout << "请输入矩阵A的维数m*n：" << endl; cout <<"m="; cin >> m; cout <<"n="; cin >> n; int* iarrA = new int[m*n]; cout << "请输入矩阵A各元素：" << endl; for(i = 0;i < m;i++) { for(j = 0;j < n;j++) { cout << "iarrA" << i << j << "="; cin >> iarrA[i*n+j]; } } cout << "请输入矩阵B的列数p：" << endl; cout <<"p="; cin >> p; int* iarrB = new int[n*p]; cout << "请输入矩阵B各元素：" << endl; for(i = 0;i < n;i++) { for(j = 0;j < p;j++) { cout << "iarrB" << i << j << "="; cin >> iarrB[i*p+j]; } } int* iarrC = new int[m*p]; fnMatrixMultriply(iarrA,iarrB,iarrC,m,n,p); cout << "矩阵C=A*B，C的元素是：" << endl; for(i = 0;i < m;i++) { for(j = 0;j < p;j++) { cout << iarrC[i*p+j] << "\t"; } cout << endl; } delete[] iarrA; delete[] iarrB; delete[] iarrC; return true; } int fnMatrixMultriply(const int* iarrA,const int* iarrB,int* iarrC,const int m,const int n,const int p) { int itemp; if((m <= 0) || (n <= 0) || (p <= 0)) { cout << "错误:数组维数m,n,p必须大于0!" << endl; return false; } for(int i = 0;i < m;i++) { for(int j = 0;j < p;j++) { itemp = 0; for(int k = 0;k < n;k++) { itemp = itemp + iarrA[i*n+k] * iarrB[k*p+j]; } iarrC[i*p+j] = itemp; } } }