Thread: pass the array in functions and returning array value in main fuction in c

hy i wrotea program to get temprature from user and calculate its average, highest and minimum temprature but it is giving a garbage value tell me whtx wronge with this program

Code:

#include<stdio.h>
#include<conio.h>
float average(float[],float );
float highest(float[],float );
float lowest(float[], float );
void main (void)
{
float temper[15];
float x,n, y, z;
int  day;
clrscr();
printf("enter the no.days to read temperature for=\n");
scanf("%d",&n);
for(day=0; day<n; day++)
 {
 printf("temperature for day%d=",day+1);
 scanf("%f",&temper[day]);
 }
x=average(temper,n);
printf("average temperature is=%.2f\n",x);
y=highest(temper,n);
printf("highest temperature is=%.2f\n",y);
z=lowest(temper,n);
printf("lowest temperature is=%.2f\n",z);
getche();
}

float average(float temper[],float n)
{
int sum=0.0,x;
float average;
for(x=0; x<n; n++)
 sum+=temper[x];
 average=sum/n;
 return (average);
}

float highest(float temper[],float n)
{
float highest;
int y;
highest=temper[0];
for(y=0; y<n; y++)
if(highest<temper[y])
highest=temper[y];
return(highest);
}

float lowest(float temper[],float n)
{
float y,lowest=temper[0];
for(y=0; y<n; y++)
if(lowest>temper[y])
lowest=temper[y];
return(lowest);
}