蓝桥杯2020年第十一届C++省赛第六题-成绩统计

此题考查的对语言四舍五入的理解使用

#include
using namespace std;

int main()
{
	int n;
	cin>>n;
	int greatCount = 0;
	int goodCount = 0;
	int i = 0;
	while(i>grade;
		if(grade>=60) goodCount++;
		if(grade>=85) greatCount++;
		i++;
	}
	float good = 100.0*goodCount/n;
	float great = 100.0*greatCount/n;
	printf("%.0f%n",good);
	printf("%.0f%n",great);
	return 0;
}

round()四舍五入函数

#include
#include
using namespace std;

int main()
{
	int n;
	cin>>n;
	int greatCount = 0;
	int goodCount = 0;
	int i = 0;
	while(i>grade;
		if(grade>=60) goodCount++;
		if(grade>=85) greatCount++;
		i++;
	}
	cout << round(100.0 * goodCount / n) << "%" << endl;
	cout << round(100.0 * greatCount / n) << "%" << endl;
	return 0;
}