Question

Program IN C

Prompt the user to enter month number and year. Retain an appropriate response for invalid month numbers, but don’t worry about validity of year.

2.Determine the number of days in the month entered (ignore leap years).

3.Use the answer to step 2 in one FOR-LOOP to ask the user to enter a FAHRENHEIT temperature (integer or floating) for each day of the month utilizing a prompt that includes the DATE.

a. Prompt the user to enter the Fahrenheit temperature for 2/1/2018... etc b.Continue to prompt the user for the Fahrenheit temperature for EACH day of the month entered until the loop reaches the last day of that month, e.g. 2/28/2018, last day of Feb.

4.When all daily temps have been entered, display month number, and average temperature in Fahrenheit and Celsius. (You know or can find the conversion equation.)

Display averages to nearest tenth of degree.

5.When TESTING your program and demonstrating it to your instruct or, let each month have 21 fewer days, 7, 9 or 10 instead of 28, 30 or 31.Appropriate comments and messages to user are required

.

Answer 1

The snapshot the required C program is as below:-

//Output

Attaching the text of the C code, in snapshot of the code above the last printf statement didn't came clearly, the ending part were cut, you can refer the below code for clarity:-

#include<stdio.h>
int main()
{
   //variable declaration
   int month_number=0;
   int year=0;
   int no_of_days=0;
   int i=0;
   float tempF[31]; //temperature array for storing fahrenheit values
   float sumTempF=0;//sum of fahrenheit temperature
   float avg_Fahrenheit_temp=0;//average fahrenheit temparature
   float avg_Celsius_temp=0;//average celsius temparature ->calculated using conversion formula
  
   //prompt user to enter month
   while(1) //infinite loop to prompt user again in case invalid month is entered
   {
  
   printf("Enter Month Number\n");
   scanf("%d",&month_number);
  
   if(month_number<1 || month_number>12) //month is invalid
   {
       printf("Invalid Month!\n");
       continue;
   }
   else
   {
       break;
   }
  
   }
   //prompt user to enter year
   printf("Enter Year\n");
   scanf("%d",&year);
  
   //Determine number of days in the month
  
   switch(month_number)
   {
       case 1:
           no_of_days=31; //Jan
           break;
          
       case 2:
           no_of_days=28; //Feb
           break;
      
       case 3:
           no_of_days=31; //Mar
           break;
      
       case 4:
           no_of_days=30; //Apr
           break;

       case 5:
           no_of_days=31; //May
           break;
      
       case 6:
           no_of_days=30; //Jun
           break;  
          
       case 7:
           no_of_days=31; //Jul
           break;
      
       case 8:
           no_of_days=31; //Aug
           break;
      
       case 9:
           no_of_days=30; //Sep
           break;
      
       case 10:
           no_of_days=31; //Oct
           break;
      
       case 11:
           no_of_days=30; //Nov
           break;
      
       case 12:
           no_of_days=31; //Dec
           break;
      
   }
  
   //for loop for taking input of temperatures of days in the given moth from user
  
   //reducing days by 21 as asked in question
   no_of_days=no_of_days-21; //you can comment this line if you want to enter actual days of 28,30,31
  
   for(i=1;i<=no_of_days;i++)
   {
       printf("Enter FAHRENHEIT temperature for %d/%d/%d\n",month_number,i,year);
      
       //as array starts from 0 we take index as i-1 since i=1 initially, i-1=0, you can take separate variable also
       //but for reusability i have used i itself
      
       scanf("%f",&tempF[i-1]);
          
       //calculating sum of fahrenheit temperature
      
       sumTempF=sumTempF+tempF[i-1];
          
      
   }//for close
  
   avg_Fahrenheit_temp=sumTempF/no_of_days;
  
   //conversion formula fahrenheit to celsius
   // c/5=(f-32)/9
   avg_Celsius_temp=(5.0)*((avg_Fahrenheit_temp-32)/9.0);  
  
   //"%.1f" is used to round degrees upto tenth of a degree i.e upto 1 decimal place
   printf("Month Number = %d \t Average Temperature in Fahrenheit = %.1f \t Average Temperature in Celsius = %.1f",month_number,avg_Fahrenheit_temp,avg_Celsius_temp);
  
   return 0;
}