判断是否有序,不能用数组的方法来判断 输入整数数列长度n,然后输入数列内容,输出有序无序
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- benbenli 2021-05-23 23:52关注
#include<stdio.h> int main() { int n, x, y; printf("Please enter n: "); scanf("%d", &n); printf("Please enter %d numbers:\n", n); if (n == 1) { printf("Only 1 number, in order any way."); } else { scanf("%d%d", &x, &y); int ascending = x <= y ? 1 : 0; x = y; for (int i = 2; i < n; ++i) { scanf("%d", &y); if (ascending ^ (x < y)) { printf("Not in order."); return 0; } x = y; } if (ascending) { printf("in ascending order."); } else { printf("in descending order."); } } return 0; } // Output Please enter n: 9 Please enter 9 numbers: 1 2 3 4 5 6 7 8 9 in ascending order. Please enter n: 10 Please enter 10 numbers: 9 8 7 6 5 4 3 2 1 0 in descending order. Please enter n: 5 Please enter 5 numbers: 1 5 9 3 2 Not in order. Please enter n: 3 Please enter 3 numbers: 1 3 2 Not in order. Please enter n: 2 Please enter 2 numbers: 1 2 in ascending order.
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