C++Primer第五版第四章练习4.22

/*
练习4.22：
将成绩划分成>90high pass、>75pass、>60low pass和<60fail四种。
分别用条件运算符和if实现。
*/
#include "TouWenJian_4.h"
/*条件运算符实现
int main()
{
	int grade=0;
	while(cin>> grade)
	{
		string FinalGrade = (grade > 90) ? "high pass"
										: (grade > 75) ? "pass"
										: (grade > 60) ? "low pass"
										: "fail";
		cout<<FinalGrade<<endl;
	}

	return 0;
}
*/
//if实现
int main()
{
	int grade=0;
	while(cin>> grade)
	{
		if(grade>90)
			cout<<"high pass"<<endl;
		else if(grade>75)
			cout<<"pass"<<endl;
		else if(grade>60)
			cout<<"low pass"<<endl;
		else 
			cout<<"fail"<<endl;
	}

	return 0;
}