最大值和最小值相减的平均值 returns 错误结果

Question

我想求除 table 的最大值和最小值之外的 5 个数字的平均值。

但是下面的代码提供了错误的结果。

#include <stdio.h> 

#define size 5

main() {
  int i;
  float table[size], max, min, mo, sum;
  max = 0;
  min = 0;
  mo = 0;

  printf("Provide a number: ");
  scanf("%f", &table[1]);
  max = table[1];
  min = table[1];

  for (i = 2; i <= size; i++) {
    printf("Provide a number: ");
    scanf("%f", &table[i]);

    if (max <= table[i])
      max = table[i];
    if (min >= table[i]) {
      min = table[i];
    }
    sum = sum + table[i];
  }

  mo = (sum - max - min) / (size - 2);
  printf("The average numberis: %f", mo);
}

示例：

如果您输入 1,2,3,4,5，输出将是 2,666667 而不是 3。

您能告诉我为什么会这样吗？

Answer 1

我已经根据评论编辑了代码，并且它的词正确。非常感谢！

#include <stdio.h> 

#define size 5

main() {
  int i;
  float table[size], max, min, mo, sum;
  max = 0;
  min = 0;
  mo = 0;

  printf("Provide a number: ");
  scanf("%f", &table[0]);
  max = table[0];
  min = table[0];
  sum = table[0];

  for (i = 1; i < size; i++) {
    printf("Provide a number: ");
    scanf("%f", &table[i]);

    if (max <= table[i])
      max = table[i];
    if (min >= table[i]) {
      min = table[i];
    }
    sum = sum + table[i];
  }

  mo = (sum - max - min) / (size - 2);
  printf("The average numberis: %f", mo);
}

Answer 2

以下修改后的代码工作正常。

#include <stdio.h>

#define size 5

void main()
{
   int i=0, count=0;
   float table[size], max, min, sum=0, avg;

   //read all five numbers
   for (i = 0; i < size; i++)
   {
       printf("Provide a number: ");
       scanf("%f", &table[i]);
   }

   //find max and min
   max = table[0];
   min = table[0];
   for (i = 1; i < size; i++)
   {
      if(max < table[i])
       max = table[i];

      if(min > table[i])
       min = table[i];
   }

   //calculate sum and average leaving the max and min
   for (i = 0; i < size; i++)
   {
       if((table[i] != max) && (table[i] != min))
       {
           sum = sum + table[i];
           count++;
       }
   }
   avg = sum/count;

   printf("\r\nThe average number is: %f", avg);


}

`

最大值和最小值相减的平均值 returns 错误结果

Average subtracted of max and min returns wrong result

c

sum

max

average

min