c++期末作业，有一个错误一直改不了，

int main()//主函数进行彩票开奖
{
         char c;//循环答案
         bool flag;//用于事件控制循环
         flag=true;
         while(flag)
         {
             cout<<"now the game begin!"<<endl;
             printline();
             cout<<"~~~~~~~~~~彩票游戏~~~~~~~~~~"<<endl;
             printline();
             printword();
             printline();
             cout<<"~~~~~~~~~~祝您好运~~~~~~~~~~"<<endl;
             printline();
             cout<<"请输入您的初始金额："<<endl;
             int sum;//账户初额
            cin>>sum;
            if (sum>=2);
            {
                sum=sum-2;//下注            
            }
117            else
             {                           
                 cout<<sum<<endl;break;
             }
             int jiangxiang=caipiaoyanzheng();//奖金的注入
             if(jiangxiang==0)
             {
                 sum=sum;
             }
             else if(jiangxiang==1)
             {
                 sum=sum;
             }
             else if(jiangxiang==2)
             {
                 sum=sum+50;
             }
             else if(jiangxiang==3)
             {
                 sum=sum+1000;
             }
             else if(jiangxiang==4)
             {
                 sum=sum+1000000;
             }
             else if(jiangxiang==5)
             {
                 sum=sum+2000000;
             }
             else if(jiangxiang==6)
             {
                 sum=sum+5000000;
             }
             cout<<"您的余额为："<<sum<<endl;//输出余额
             cout<<"是否继续进行彩票游戏，是输入[Y]或[y],否输入其他字符"<<endl;//彩票循环提示
             cin>>c;
             if(!(c=='y'||c=='Y'))flag=false;
    }
}
117    4    D:Untitled1.cpp    [Error] 'else' without a previous 'if'
为什么这个else没办法修改，到底该怎么该，跪求大佬