Answer:
#include <stdio.h>//defining header file
int max (int x, int y, int z) //defining a method max that hold three parameters
{
 if(x>=y && x>=z)//defining if block that checks x is greater then y and x is greater then z
 {
 return x;//return the value x 
 }
 else if(y>z)//defining else if block it check y is greater then z
 {
 return y;//return the value y
 }
 else//else block
 {
 return z;//return the value z 
 }
}
int min (int x, int y, int z) //defining a method max that holds three parameters
{
if(x<=y && x<=z) //defining if block that check x value is less then equal to y and less then equal to z
{
return x;//return the value of x
}
if(y<=x && y<=z) //defining if block that check y value is less then equal to x and less then equal to z
{
return y;//return the value of y
}
if(z<=x && z<=x)//defining if block that check z value is less then equal to x 
{
return z;//return the value of z
}
return x;//return the value of z 
}
int average (int x, int y, int z) //defining average method that take three parameters
{
int avg= (x+y+z)/3;//defining integer variable avg that calculate the average
return avg;//return avg value
}
int main()//defining main method
{
 int x,y,z;//defining integer variable
 printf("Enter first value: ");//print message
 scanf("%d",&x);//input value from the user end
 printf("Enter Second value: ");//print message
 scanf("%d",&y);//input value from the user end
 printf("Enter third value: ");//print message
 scanf("%d",&z);//input value from the user end
 printf("The maximum value is: %d\\", max(x,y,z));//calling the method max
 printf("The minimum value is: %d\\", min(x,y,z));//calling the method min
 printf("The average value is: %d\\", average(x,y,z));//calling the method average
 return 0;
}
Output:
Enter first value: 45 
Enter Second value: 35 
Enter third value: 10 
The maximum value is: 45 
The minimum value is: 10 
The average value is: 30 
 Step-by-step explanation:
In the above-given code, three methods "max, min, and average" is declared that holds three integer variable "x,y, and z" as a parameter and all the method work as their respective name.
- In the max method, it uses a conditional statement to find the highest number among them.
 - In the min method, it also uses the conditional statement to find the minimum value from them.
 - In the average method, it defined an integer variable "avg" that holds the average value of the given parameter variable.
 - In the main method, three variable is defined that inputs the value from the user end and passes to the method and print its value.