练21.2 邮寄包裹

2
邵馨羽qcx LV 6 @ 2026-1-23 12:15:44

需要全部Copy的说一下，有时间我发。

邵馨羽qcx LV 6 @ 2026-1-23 12:11:03

#include <bits/stdc++.h>

using namespace std;

int main() {

int a;

cin >> a;

if (a <= 10) {

cout << fixed << setprecision(2) << a * 0.8+
0.2;
}

else if (a > 10 && a <= 20) {

cout << fixed << setprecision(2) << (a-10) 
* 0.75 +10*0.8+0.2;
}

else if (a > 20 && a <= 30) {

cout << fixed << setprecision(2) << (a-20)*
0.7+10*0.75+10*0.8+0.2;
}

else {

cout << "Fail";
}

return 0;

}

侬孜翌2026dly LV 7 @ 2026-3-17 20:02:58

#include <bits/stdc++.h>
using namespace std;
int main() {
	int a;
	cin >> a;
	if (a <= 10) {
		cout << fixed << setprecision(2) << a * 0.8+0.2;
	} else if (a > 10 && a <= 20) {
		cout << fixed << setprecision(2) << (a-10) * 0.75 +10*0.8+0.2;
	} else if (a > 20 && a <= 30) {
		cout << fixed << setprecision(2) << (a-20)*0.7+10*0.75+10*0.8+0.2;
	} else {
		cout << "Fail";
	}
	return 0;
}