写一个函数，使给定的一个二维数组（NXM）转置，即行列互换

#define _CRT_SECURE_NO_WARNINGS#include<stdio.h>#include<stdlib.h>#include<math.h>#include<string.h>#include<Windows.h>#define N 3#define M 3void rankexchange(int a1[N][M]){int b1[N][M];for (int i = 0; i < N;i++)for (int j = 0; j < M; j++){b1[j][i] = a1[i][j];}for (int i = 0; i < N; i++)for (int j = 0; j < M; j++){a1[i][j] = b1[i][j];}}void main(){int a[N][M] = {{ 1, 2, 3 },{ 1, 2, 3 },{ 1, 2, 3 }};rankexchange(a);for (int i = 0; i < N; i++)//打印结果{for (int j = 0; j < M; j++){printf("%3d", a[i][j]);}printf("\n");}system("pause");}