这句是什么意思，是一个warning


warning C4244: '=' : conversion from 'double' to 'long', possible loss of data

代码如下


#include<stdio.h>
#include<stdlib.h>
void main()
{
    int long profit,bonus1,bonus2,bonus4,bonus6,bonus10,bonus;
    printf("请输入当月利润\n");
    scanf("%ld",&profit);
    bonus1=100000*0.1;
    bonus2=bonus1+100000*0.75;
    bonus4=bonus2+200000*0.5;
    bonus6=bonus4+200000*0.3;
    bonus10=bonus6+400000*0.15;
    if (profit<=100000)
        bonus=profit*0.1;
    else
        if (profit<=200000)
            bonus=bonus1+(profit-100000)*0.75;
        else
            if (profit<=400000)
                bonus=bonus2+(profit-200000)*0.5;
            else
                if (profit<=600000)
                    bonus=bonus4+(profit-400000)*0.3;
                else
                    if (profit<=1000000)
                        bonus=bonus6+(profit-600000)*0.15;
                    else
                        bonus=bonus10+(profit-1000000)*0.1;
                    printf("当月利润为:%ld\n当月应得奖金为:%ld\n",profit,bonus);
                    system("pause");
}

英盲