语言及算法基础篇 第二章 顺序结构程序设计

无聊的时候来更第二三四五六章。。。（手动狗头

//2064:交换值 
#include 
using namespace std; 
int main()
{
	int a,b;
	cin >> a >> b;
	int temp = a;
	a = b;
	b = temp;
	cout << a << " " << b; 
}
//2065:求和 
#include 
using namespace std; 
int main()
{
	int a,b,c;
	cin >> a >> b >> c;
	cout << a+b+c;
} 
//2066:买图书
#include 
using namespace std; 
int main()
{
	float n,m;
	cin >> n >> m;
	printf("%.2f",n-m*0.8);
} 
//1006:A+B问题 
#include 
using namespace std; 
int main()
{
	int a,b;
	cin >> a >> b;
	cout << a+b; 
} 
//1007:计算(a+b)/c的值
#include 
using namespace std; 
int main()
{
	int a,b,c;
	cin >> a >> b >> c;
	cout << (a+b)*c;
}

//1008:计算(a+b)/c的值
#include 
using namespace std; 
int main()
{
	int a,b,c;
	cin >> a >> b >> c;
	cout << (a+b)/c;
}
//1009:带余除法 
#include 
using namespace std; 
int main()
{
	int a,b;
	cin >> a >> b; 
	cout << a/b << " " << a%b;
}
//1010:计算分数的浮点数值 
#include 
using namespace std; 
int main()
{
	int a,b;
	cin >> a >> b;
	double result = (double)a/b;
	printf("%.9f",result);
}

//2067:圆
#include 
using namespace std; 
int main()
{
	float r;
	cin >> r;
	printf("%.4f %.4f %.4f",2*r,2*3.14159*r,3.14159*r*r);
}
//2068：鸡兔同笼 
#include 
using namespace std; 
int main()
{
	int x,y;
	cin >> x >> y;
	int a,b;
	b = (y-2*x)/2;
	a = x-b;
	cout << a << " " << b;
}
//1011：甲流疫情死亡率
#include 
using namespace std; 
int main()
{
	float a,b;
	cin >> a >> b; 
	printf("%.3f%%",b/a*100);
}