5月19日:1005：地球人口承载力估计

方法一
#include<iostream>
#include<iomanip>
using namespace std;
int main()
{
int a,x,b,y;
double z;
cin>>x>>a>>y>>b;
z=(a*x-b*y)/(a-b);
cout<<fixed<<setprecision(2)<<z;
return 0;
}
方法二
#include<iostream>
#include<iomanip>
using namespace std;
int main()
{
int a,x,b,y;
double z;
cin>>x>>a>>y>>b;
cout<<fixed<<setprecision(2)<<(a*x-b*y)/(a-b);
return 0;
}
方法三
#include<iostream>
using namespace std;
int main()
{
int a,x,b,y;
double z;
cin>>x>>a>>y>>b;
z=(a*x-b*y)/(a-b);
printf("%c",z)
return 0;
}
方法四
#include<iostream>
using namespace std;
int main()
{
int a,x,b,y;
double z;
cin>>x>>a>>y>>b;
printf("%c",(a*x-b*y)/(a-b))
return 0;
}

标签：std,includeusing,19,double,namespace,int,承载力,1005,main
来源： https://www.cnblogs.com/hqy812/p/16296054.html