本人土建技术员，对编程感兴趣现在自学C语言，刚学3天，想编一个最简单的通过输入身高体重计算身材标准的程序，下面是我的代码：
#include <stdio.h>
int main()
{
        int tall;
        int weight;
        int balance;
        
        printf ("请输入你的身高(cm)：\n");
        scanf("%d",&tall);
        
        printf ("请输入你的体重(kg)：\n");
        scanf ("%d",&weight);
        
        balance=(tall-100)*0.9;
        
        printf("你的体重标准值应为：\n");
        printf("%d",balance);
        
        if(weigth>balance)
        {
            printf("超重\n");
        }
        if(weight<balance)
        {
            printf("偏瘦\n");
        }
        if(weight==balance)
        {
            printf("标准身材\n");
        }
   
        return 0;
}        
显示错误的地方为，[Error] 'weigth' was not declared in this scope，求大神赐教错误在娜里，应该怎么修改？

应该怎么排写呢？

我的天，我好像是瞎了，谢谢！！！！！