程序的运行结果是：_________. # include int main(void) { int i, j, temp; int a[3][3]; for(i = 0; i < 3; i++) for(j = 0; j < 3; j++) a[i][j] = i * 3 + j + 1; for(i = 0; i < 3; i++) for(j = 0; j < 3; j++) if(i <= j){ temp = a[i][j]; a[i][j] = a[j][i]; a[j][i] = temp; } for(i = 0; i <3; i++){ for(j = 0; j <3; j++) printf("%d", a[i][j]); printf(" "); } return 0; }