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例如：输入下面的矩阵：
100 200 300
400 500 600
700 800 900
程序输出：
100 400 700
200 500 800
300 600 900
代码如下所示：
#include <stdio.h> int fun(int array[3][3]) { int i, j,temp; for (i = 0; i < 3;
i++) { for (j = 0; j < i; j++) { temp = array[i][j];//设置中间变量实现交换 array[i][j] =
array[j][i]; array[j][i] = temp; } } } main() { int i, j; int array[3][3] = { {
100,200,300}, {400,500,600}, {700,800,900} }; printf("变化前的矩阵是:\n"); for (i = 0;
i< 3; i++) { for (j = 0; j < 3; j++) printf("%7d", array[i][j]); printf("\n"); }
fun(array); printf("变化后的矩阵是：\n"); for (i = 0; i < 3; i++) { for (j = 0; j < 3; j
++) printf("%7d", array[i][j]); printf("\n"); }
输出结果如下所示：
