Question

Problem Definition

Write a program called process_ages that reads in an array of up to 10 integers representing peoples ages in years and calculates and prints the maximum age and the minimum age and the average age. Your program should stop reading when either the 10th number is entered or the user enters -1. If the user enters any other negative number or a value above 150, they should be warned and prompted again for a valid age.

You should then print the:

1. maximum
2. minimum and
3. average

ages on the same line.

Testing
In a text file called process_ages.txt write three test cases. Two example test cases are:

input        maximum  minimum  average
10 11 12     12       10       11
1 2 3 4      4        1        2.5

Coding

Implement the problem definition above in a file called process_ages.c.

Answer 1

Please see the code below, it has appropriate comments

/******************************************************************************

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

int main()
{
int count=0,min=0,max=0,num[10],i,j,temp,temp1,size=0,sum=0;
float avg;
// Take input of ten numbers
printf("Enter 10 numbers:\n");
for(i=0;i<=9;i++)
{
scanf("%d",&temp);
if(temp==-1) //check if input is -1
{
size=i;
goto X;}
else if(temp>150 && temp < -1)
printf("enter either -1 or a less positive number"); //Warning to enter correct values
else
{
num[i]=temp;
temp=0;
}
i=i++;
}
  
X:
if(size==0)
{
printf("No data given");
return 0;
}
for (j=0;j<size;j++) //calculating sum
sum=num[j]+sum;
avg=sum/(float)size; //calcuating average
  
if (size>2)
{
//sorting numbers in ascending order
for(i=0;i<=size;i++)
{
for(j=0;j<=size;j++)
{
if(num[j]>num[j+1])
{
temp1=num[j];
num[j]=num[j+1];
num[j+1]=temp1;
}
}
}
}
  
printf("\n The Maxmimum number: %d",num[size]); //print Maxmimum
printf("\n The Minimum number: %d", num[1]); //print Minimum
printf("\n The average: %f",avg); //print average
  

return 0;
}

*****************************************

one sample of output with this code