算法練習題7（病人年齡段比例問題）

 

我：

int n;
	int ages[105] = {0};

	cin >> n;

	int pA = 0, pB = 0, pC = 0, pD=0;
	for (int i = 0; i < n; i++)
	{
		cin >> ages[i];
	}

	for (int i = 0; i < n; i++)
	{
		if (ages[i] <= 19) {
			pA++;
		}
		else if (ages[i] > 19 && ages[i] <= 39) {
			pB++;
		}
		else if (ages[i] > 39 && ages[i] <= 59) {
			pC++;
		}
		else {
			pD++;
		}
	}

	cout << pA * 100.00 / n << "%" << endl;
	cout << pB * 100.00 / n << "%" << endl;
	cout << pC * 100.00 / n << "%" << endl;
	cout << pD * 100.00 / n << "%" << endl;