本人新学C语言比较笨，最近一个编程老是改不对求老师指出错误。
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#include"stdio.h"

void values(int *a,int *b, int *c)
{
  int x,y,z;

  printf("Enter a whole number: ");

  scanf("%d",&x);

  *a=x;

 
  printf("Enter a second whole number: ");

  scanf("%d",&y);

  *b=y;

  printf("Enter a third whole number: ");

  scanf("%d",&z);

  *c=z;

}

int smallest(int *a, int *b, int *c)
{


   int small=*a;
  
   if (*a>*b){
     small=*b;
   }

   if (*b>*c){
     small=*c;
   }

 
   return small;
}

int largest(int *a, int *b, int *c)
{

   int large=*a;

   if (*a<*b){
      large=*b;
   }

   if (*b<*c){
      large=*c;
   } 

   return large;
}

void a2question2()
{
  int *a,*b,*c,sum,product;

  float average;

  values(a,b,c);

  sum = *a+*b+*c;

  average = (*a+*b+*c)/3;

  product = *a**b**c;

  printf("Sum = %d\nAverage = %.2f\nProduct = %d\nSmallest = %d\nLargest = %d\n",sum,average,product,smallest(a,b,c),largest(a,b,c));

}

int main()
{

  a2question2();

  return 0;
}

最后出现 segment fault. 我不知道指针哪里不对了。

values(a,b,c); 怎么了

不用指针的话，scanf里输入的数，在main里运算出错误的数据，题目要求用一个函数收集input，另一个函数运算然后print出来




如果把指针全去掉就会出现

主要是我想让输入的数运算正确而如果我用&a形式 在main函数里就变成随机数了4,5,3相加等于一个特别大的数，不是12

#include"stdio.h"

void values(int a,int b, int c)
{

  printf("Enter a whole number: ");

  scanf("%d",&a);

  printf("Enter a second whole number: ");

  scanf("%d",&b);

  printf("Enter a third whole number: ");

  scanf("%d",&c);

}

int smallest(int a, int b, int c)
{


   int small=a;
  
   if (a>b){
     small=b;
   }

   if (b>c){
     small=c;
   }

 
   return small;
}

int largest(int a, int b, int c)
{

   int large=a;

   if (a<b){
      large=b;
   }

   if (b<c){
      large=c;
   } 

   return large;
}

void a2question2()
{
  int sum,product,a,b,c;

  float average;

  values(a,b,c);

  sum = a+b+c;

  average = (a+b+c)/3;

  product = a*b*c;

  printf("Sum = %d\nAverage = %.2f\nProduct = %d\nSmallest = %d\nLargest = %d\n",sum,average,product,smallest(a,b,c),largest(a,b,c));

}

int main()
{

  a2question2();

  return 0;
}

output类似这样