p1.cpp

好东西,绝对是好东西,我向大家推荐

#include <iostream.h>
#include <stdio.h>
int main()
{
	double N,m;
	while(cin>>N)
	{
		if(N>120) {m=N*5.0*0.7;}
		        else if(N>80&&N<=120) {m=N*5.0*0.8;}
				else if(N>40&&N<=80) {m=N*5.0*0.85;}
					else if(N>20&&N<=40) {m=N*5.0*0.9;}
						else {m=N*5.0;}
		printf("%.2f\n",m);
	}
}