一个高个子，一个低个子，求一棵树的高度，用相似三角形

C/C++ code

#include <stdio.h>int main(void){    int shorty = 0L;//shorty's height in inches    int lofty = 0L;//lofty's height in inches    long feet = 0L;    long inches = 0L;    long shorty_to_lofty= 0L; //Distance from shorty to the tree in inches    long  lofty_to_tree = 0L;/*distance from lofty to the tree in inches*/    long tree_height = 0;/*height of the tree in inches*/    const long inches_per_foot =12L;    /*Get lofty's height*/    printf("Enter lofty's hight to the top of his/her head in the whole feet:");    scanf("%ld",&feet);    printf("...and then inches:");    scanf("%ld",&inches);    lofty= feet * inches_per_foot +inches;    /*Get shorty's height*/    printf("Enter shorty's hight to the top of his/her eyes in the whole feet:");    scanf("%ld",&feet);    printf("...and then inches:");    scanf("%ld",&inches);    shorty= feet*inches_per_foot +inches;        /*Get the distance from Lofty to the tree*/    printf("Finally enter the distance to the tree to the nearest foot:");    scanf("%ld",&feet);    lofty_to_tree = feet*inches_per_foot;    //the code to calculate the height of the tree will go here    //calculate the height of the tree in inches    tree_height=shorty+(shorty_to_lofty+lofty_to_tree)*(lofty-shorty)/shorty_to_lofty;    //the code to dispay the result will go here     printf("The height of the tree is %ld feet and %ld inches.\n",tree_height/inches_per_foot,        tree_height%inches_per_foot);            return 0;}

代码如上， 运行时出现错误， 在 tree_height=shorty+(shorty_to_lofty+lofty_to_tree)*(lofty-shorty)/shorty_to_lofty;
请高手解答

[解决办法]
shorty_to_lofty这个怎么能是0，就算是0，怎么能被除。。。。
[解决办法]
感觉楼主应该还要输入一下shorty_to_lofty的值。。。