View Compilation Error

0_0_29352999_28456.cpp:1:1: error: 'include' does not name a type
 include<stdio.h>int main(){    int n,u,d;    while(scanf("%d%d%d",&n,&u,&d),n)    {//将一上一下看成整个过程         int t=(n-u)/(u-d);        if(t*(u-d)<(n-u)) t++;//不是一个整的过程，最后一次是上升的         t*=2;        t++；        printf("%d\n",t);    }        return 0;}
 ^