输入三只小猪的体重，比较谁最重，打印出来，我的程序如下，不想用&&，因为我觉得我的思路没错，可程序逻辑就是不对，有没有明眼人帮我看看哪里错了
#include<iostream>
#include "string"
using namespace std;
int main()
{
    float A;
    float B;
    float C;
    cout<<"请输入A的体重"<<endl;
    cin>>A;
    cout<<"请输入B的体重"<<endl;
    cin>>B;
    cout<<"请输入C的体重"<<endl;
    cin>>C;
    cout<<"A的体重"<<A<<endl;
    cout<<"B的体重"<<B<<endl;
    cout<<"C的体重"<<C<<endl;
    if (A>B)
    {
        if (B>=C)
            {cout<<"最重的猪是:A1"<<endl;}
        else
        {
            if(A>C)
                {cout<<"最重的猪是:A2"<<endl;}
            else if (A=C)
                {cout<<"最重的猪是:AC3"<<endl;}
            else
                {cout<<"最重的猪是:C4"<<endl;}

        }
    }
    else if(A=B)
    {
        if(A>C)
            {cout<<"最重的猪是:BA5"<<endl;}
        else if(A=C)
            {cout<<"最重的猪是:BAC6"<<endl;}
        else if(A<C)
            {cout<<"最重的猪是:C7"<<endl;}
    }
    else
    {
        if (B=C)
            {cout<<"最重的猪是:BC8"<<endl;}
        else if(B<C)
            {cout<<"最重的猪是:C9"<<endl;}
        else
            {cout<<"最重的猪是:B10"<<endl;}
    }
    system("pause");
    return 0;
}