Question

c语言编写求n个整数的平均数,中位数和众数

急急急急

Answer 1

#include <stdio.h>

int calculate_mode(int number [],int n)//求众数
{
	int i,temp;
	int p_count=1,count=1;

	temp=number[0];
	for(i=1;i<n;i++)
		if(temp==number[i])
		{
			count++;
			temp=number[i];
		}
		else
		{
			if(count>p_count)
			{
				p_count=count;//更新众数
			}
			count=1;
			
			temp=number[i];
		}
	
	return p_count;
}

double calculate_mean(int number [],int n)//求平均值
{
	int i;
	double sum=0;

	for(i=0;i<n;i++)
	{
		sum+=number[i];
	}

	return sum/n;
}

double calculate_median(int number [],int n)//求中位数
{
	if(n%2==0)
		return (number[n/2-1]+number[n/2])/2.0;
	else
		return number[n/2];
}


int main(void)
{
	int n,i,j,number[100]={0},temp;
	double mean,median;
	int mode;

	printf("请问需要输入几位整数?\n");
		scanf("%d",&n);

	for(i=0;i<n;i++)
		scanf("%d",&number[i]);

	for(i=0;i<n;i++)//排序，方便计算
		for(j=i+1;j<n;j++)
			if(number[i]>number[j])
			{
				temp=number[i];
				number[i]=number[j];
				number[j]=temp;
			}

	mean=calculate_mean(number,n);

	median=calculate_median(number,n);

	mode=calculate_mode(number,n);

	printf("平均值是%f\n中位数是%f\n众数是%d",mean,median,mode);

	return 0;
}
刚写的~~~如果有错误告诉我

追问

能把他以文字的形式发过来么

Answer 2

#include <stdio.h>
#include <stdlib.h>

int main(void)
{
int *a = (int *)malloc(sizeof(int) * 100);

int i = 0, j = 100;
puts("输入x结束：");
scanf("%d", &a[i]);
do
{
i++;
if(i == j)
{
j = j + 100;
a = (int *)realloc(a, j * sizeof(int));
}

}while(scanf("%d", &a[i]) && a[i] != 'x');
int k, l = 0;
for(k = 0; k < i; k++)
{
l = l + a[k];
}
printf("平均数是:\n%d\n", l / i);
int t;
for(k = 0; k < i; k++)
{
for(l = 0; l < i; l++)
{
if(a[l] > a[l + 1])
{
t = a[l];
a[l] = a[l + 1];
a[l + 1] = t;
}
}
}

l = a[i - 1] + 1;
j = 0;
int m = 1;
int n = 0;
int b[i];
b[0] = l;
int v = 0;
int c = 0;
while(j < i)
{
while(a[j] == a[j - 1])
{
m++;
l = a[j];
j++;

}
if(m > n)
{
n = m;
b[0] = l;
c = 0;
v = 0;

}
else if(m == n)
{
v++;
b[v] = l;
c = 1;
}
m = 1;

j++;

}

if(c == 0)
printf("众数是%d", b[0]);
else
{
puts("众数分别是:");
for(k = 0; k <= v; k++)
{
printf("%d,", b[k]);
}
}
if(i % 2 == 0)
printf("中位数是:\n%d\n", a[(i / 2 + (i + 2) / 2 ) / 2]);
else
printf("中位数是:\n%d\n", a[(i + 1) / 2]);
system("pause");
}

Answer 3

追问

能把他以文字的形式发过来么