谭浩强C++课后习题28——矩阵转置
题目描述:编写一个函数,将一个3*3的整型矩阵转置。
方法一:重新开辟一个二维数组,把转置后的数放入新的二维数组。
#include<iostream>
using namespace std;
const int n = 3;
void Move(int matrix1[][n], int matrix2[][n]) {
for (int i = 0;i < n;i++) {
for (int j = 0;j < n;j++) {
matrix2[j][i] = matrix1[i][j];
}
}
}
int main() {
int matrix1[n][n], matrix2[n][n];
cout << "输入矩阵:" << endl;
for (int i = 0;i < n;i++)
for (int j = 0;j < n;j++)
cin >> matrix1[i][j];
Move(matrix1, matrix2);
cout << "矩阵转置:" << endl;
for (int i = 0;i < n;i++) {
for (int j = 0;j < n;j++)
cout << matrix2[i][j] << " ";
cout << endl;
}
}
方法二:在原二维数组上直接转置,只需要遍历对角线之上或者之下的元素即可。
#include<iostream>
using namespace std;
const int n = 3;
void move(int matrix[][n]) {
int temp;
for (int i = 1;i < n;i++) {
for (int j = 0;j < i;j++) {
temp = matrix[i][j];
matrix[i][j] = matrix[j][i];
matrix[j][i] = temp;
}
}
}
int main() {
int matrix[n][n];
cout << "输入矩阵:" << endl;
for (int i = 0;i < n;i++)
for (int j = 0;j < n;j++)
cin >> matrix[i][j];
cout << "矩阵转置:" << endl;
move(matrix);
for (int i = 0;i < n;i++) {
for (int j = 0;j < n;j++)
cout << matrix[i][j] << " ";
cout << endl;
}
}
运行结果: