二进制转十进制

#include<iostream>
#include<string>
#include<cmath>
using namespace std;

//二进制转十进制 
int binaryToTen(string binary);

//判断是否是二进制 
bool isBinary(string binary); 

int main()
{
    while(true)
    {
        string binary;
        cout<<"请输入二进制数"<<endl;

        getline(cin,binary);

        int result;
        result=binaryToTen(binary); 

        if(result==-1)
        {
            cout<<"不是二进制，转换失败"<<endl<<endl;
        }
        else
        {
            cout<<"对应的二进制数为 "<<result<<endl<<endl;
        }
    }

    return 0;
}

int binaryToTen(string binary)
{
    if(isBinary(binary)!=true)
    {
        return -1;
    }

    int result=0;
    int c=0;
    for(int i=binary.length()-1;i>=0;i--)
    {       
        if(binary.at(i)=='1')
        {
            result+=pow(2,c);                       
        }   
        c++;    
    }

    return result;  

}

bool isBinary(string binary)
{   
    bool isBinary=true; 
    for(int i=0;i<binary.length();i++)
    {
        if(binary[i]!='0'&&binary[i]!='1')
        {
            isBinary=false; 
        }       
    }

    return isBinary;
}