c语言输入矩阵阶数n给n阶矩阵的元素按行序由1到n×n顺序赋值然后将其向右旋转90度输出旋转后的矩阵。

#include <stdio.h>

#define MAXN 20

int main() {
    int n, a[MAXN][MAXN] = {0};
    scanf("%d", &n);
    int num = 1;
    for (int i = 0; i < n; i++) {
        for (int j = 0; j < n; j++) {
            a[i][j] = num++;
        }
    }
    //旋转矩阵
    int b[MAXN][MAXN] = {0};
    for (int i = 0; i < n; i++) {
        for (int j = 0; j < n; j++) {
            b[j][n-1-i] = a[i][j];
        }
    }
    //输出旋转后的矩阵
    for (int i = 0; i < n; i++) {
        for (int j = 0; j < n; j++) {
            printf("%d ", b[i][j]);
        }
        printf("\n");
    }
    return 0;
}
``