#includeint main() { int k = 0; int j = 0; int i = 0; printf("请输入:"); scanf("%d", &k); if (k == 9) { for (j = 1;j <= 9;j++) { for (i = 1; i <= j;i++) { printf("%d*%d=%-2d ", j, i, j * i); } printf("n"); } } if (k == 12) { for (j = 1;j <= 12;j++) { for (i = 1; i <= j;i++) { printf("%-2d*%2d=%-2d ", j, i, j * i); } printf("n"); } } return 0; }



