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PAT乙级 1053 住房空置率 (20分)
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发布时间:2019-03-12

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1053 住房空置率 (20分)

[难点]

对于可能和一定空的条件判断需要仔细读题

所有的问题都是因为条件判断出错导致的。其它没有难点

[问题]

1.如何输出小数点后1位的数字?使用printf("%.nf“,x),n表示小数点后几位。

2.输出不了%?printf输出%需要两个%%

[代码]

#include
using namespace std;int main(){ int all = 0; float thr = 0; int tday = 0; cin >> all >> thr >> tday;//三个输入变量 int may = 0, certain = 0; for (int i = 0; i < all; i++) { int day = 0; cin >> day;//输入观察天数 int low = 0; for (int i = 0; i < day; i++) { float temp = 0; cin >> temp; if (temp < thr) low++; } if (low*2 > day && day<=tday)//超过一半的日子用电低于阈值 但是观察天数小于等于阈值 may++; if (day > tday && low*2 > day )//超过一半的日子用电低于阈值,观察日期超过阈值 certain++; } float may1 = may*100.0/all, certain1 = certain*100.0/(float)all; printf("%.1f%%",may1); printf(" %.1f%%", certain1); return 0;}

 

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