让某人给我一些关于如何使这段代码工作的指示

Question

我的代码中有一些错误，我不知道如何解决，我认为我将函数调用到 main 错误，但我的程序停止在我无法自己解决，我尝试了一切，所以我来这里看看是否有人可以给我一些如何解决它的建议或指示

#include <cs50.h>
#include <stdio.h>

//is the size of the array 
const int n = 3;

int sum_side(float x[]);

int main(void)
{
    float sum;
    int a[n];

    sum = sum_side(a);
    // is used to get 3 sides from the user all have to be positive
    do
    {
        a[0] = get_int("First side: ");
        a[1] = get_int("Second side: ");
        a[2] = get_int("Third side: ");

    }
    while(a[0] <= 0 || a[1] <= 0 || a[2] <=0);
    
    //is used to say if it can be a triangle or nor
    if(sum_side(a[n]) == 1)
    {
        printf("Can be a triangle? ");
    }
    else
    {
        printf("Can't be a triangle? ");
    }
}


int sum_side(float x[])
{
    // Check that sum of any two sides greater than third
    if ((x[0] + x[1] <= x[2]) || (x[1] + x[2] <= x[0]) || (x[2] + x[0] <= x[1]))
    {
        return false;
    }

    // if we passe the test, we're good!
    return true;
}

Answer 1

如果有人可以给我一些如何解决的建议或指示

#1 启用所有编译器警告。

如果OP从这篇文章中学到了什么，那就是使用本地工具，就像许多编译器警告一样，来提高生产力并减少调试时间。

---

带有 OP 代码的警告示例：

warning: passing argument 1 of 'sum_side' from incompatible pointer type [-Wincompatible-pointer-types]
   14 |     sum = sum_side(a);
      |                    ^
      |                    |
      |                    int *
note: expected 'float *' but argument is of type 'int *'
    7 | int sum_side(float x[]);
      |              ~~~~~~^~~


warning: conversion from 'int' to 'float' may change value [-Wconversion]
   14 |     sum = sum_side(a);
      |           ^~~~~~~~
warning: passing argument 1 of 'sum_side' makes pointer from integer without a cast [-Wint-conversion]
   26 |     if(sum_side(a[n]) == 1)
      |                 ~^~~
      |                  |
      |                  int
note: expected 'float *' but argument is of type 'int'
    7 | int sum_side(float x[]);
      |              ~~~~~~^~~
warning: variable 'sum' set but not used [-Wunused-but-set-variable]
   11 |     float sum;
      |           ^~~