Question

Assume that, for a given town, mid-day daily temperature in Fahrenheit was measured for a month and stored in a file called temperature.txt. Write a complete C language program that reads the stored temperatures, one at a time, from the file temperature.txt and converts the read temperature to its equivalent in Celsius. Your program should store each converted temperature in an output file called results.txt. Your program should also find the average, the minimum, and the maximum temperatures in Celsius and saves the results in the output file. Use data type double for input and output temperatures.

Answer 1

Solution==================================================================

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

int main(int argc, char *argv[]) {

   FILE *fp;
   FILE *fpOut;
  
   fp=fopen("temprature.txt","r");       //File from where to read
   fpOut=fopen("celsius.txt","w");       //File from where to write
      
   double farenheitData=0;               //To store running farenhiet data from file
   double maxCelcius=DBL_MIN;           //To store max of Celsius data
   double minCelcius=DBL_MAX;           //To store min of Celsius data
   double avgCelcius=0;               //To store avg of Celsius data
   int count=0;
  
  
   while (fscanf(fp, "%lf", &farenheitData) == 1) // expect 1 successful conversion
   {
       if (feof(fp))
       {  
           //break out when we reached reading till the end of file
           break;
       }
      
       double celsiusData = (farenheitData-32)/1.8;
      
       //Determining min, max and average
       if(maxCelcius<celsiusData){
           maxCelcius=celsiusData;
       }
      
       if(minCelcius>celsiusData){
           minCelcius=celsiusData;
       }
      
       avgCelcius+=celsiusData;
       count++;
      
       fprintf(fpOut,"%lf\n",celsiusData);
   }
  
   avgCelcius=avgCelcius/count;
          
   //Writing out the max, min and average of celsius data      
   fprintf(fpOut,"Max: %lf\n",maxCelcius);  
   fprintf(fpOut,"Min: %lf\n",minCelcius);  
   fprintf(fpOut,"Avg: %lf\n",avgCelcius);      
          
   //Closing resources     
   fclose(fp);
   fclose(fpOut);
   return 0;
}

Output=====================================================

Input File:

Output File: