@[zhang2017517161](/user/759746)
[AC](https://www.luogu.com.cn/record/81326993)代码:
```
#include<stdio.h>
int main()
{
int num,i,min=2147483647;
int num1,pri1,num2,pri2,num3,pri3,price[3];
scanf("%d",&num);
scanf("%d %d",&num1,&pri1);
scanf("%d %d",&num2,&pri2);
scanf("%d %d",&num3,&pri3);
int a,b,c;
a=num/num1;
b=num/num2;
c=num/num3;
a=num%num1==0?a:a+1;
b=num%num2==0?b:b+1;
c=num%num3==0?c:c+1;
price[0]=a*pri1;
price[1]=b*pri2;
price[2]=c*pri3;
for(i=0;i<3;i++)
{
if(min>price[i])
{
min=price[i];
}
}
printf("%d\n",min);
return 0;
}
```
~~话说您样例真的过了吗。~~
**错误原因**待会说
by coldy_rainy @ 2022-07-27 10:09:50
@[zhang2017517161](/user/759746)
**错误代码**:```int num,i,min;```
**正确代码**:```int num,i,min=2147483647;```
**错误原因**:
因为这是选**最小值**```min```,所以**初始值**应该要**尽量大**,而不是**未赋值时**默认的$0$。
我这里选的是``int``能表示的最大的数```INT_MAX```($2147483647$),用其他比较大的数也是一样的效果。
by coldy_rainy @ 2022-07-27 10:13:48
@[penhaochen](/user/526755) ~~说不定lz运气好样例真的过了~~。
by _cyle_King @ 2022-07-27 10:25:20
@[penhaochen](/user/526755) 全局变量未赋值时会是零,但是函数内的变量未赋值时是不确定的(随机的)。
by _cyle_King @ 2022-07-27 10:26:55
@[penhaochen](/user/526755) AC了,感谢感谢
by zhang2017517161 @ 2022-07-27 12:57:55
@[_cyle_King](/user/582035) 好的知道了,谢谢提醒
by zhang2017517161 @ 2022-07-27 13:02:53
@[zhang2017517161](/user/759746) 萌新想问一下楼主i代表的是什么 为什么要用 for(i=0;i<3;i++)
by KFCicecream @ 2022-09-20 22:59:39