How write a program that display today temperatures and their average in c plus plus?

Answer 1

#include<iostream>

double celsius(double fahrenheit) { return((fahrenheit-32)*5/9); }

double fahrenheit(double celsius) { return(celsius*9/5+32); }

int main()

{

double f, c;

c = celsius( 32.0); // c 212.0

return(0);

}

Answer 2

Firstly, you will need some way of collecting the temperature at regular time intervals. The simplest solution would be to automate the collection of data with an electronic thermometer, but as a homework project you can simply input the data manually. Ultimately, the shorter the interval, the more accurate the results will be.

Data will need to be stored in non-volatile memory to be recalled at any time, so you will need to store the data in a file, with perhaps one file for each 24-hour period. A database would be a better option if you have a large amount of data to analyse.

Since the same interval will be used daily, a static array can be employed to analyse the results for each day. Once the required data is loaded into the array, you will determine the daily average from the sum of all the temperatures in the array divided by the number of elements. For instance, if you collected temperatures once per hour, you will have an array of 24 elements for the day. Add up all 24 elements and then divide by 24 to determine the average temperature. To compare several days you might employ several separate arrays or a two-dimensional array, where the rows represent the day and the columns represent the hours, thus allowing an hour-by-hour comparison over several days.

Ultimately, analysing the data is not the crux of the problem. The real problem is in collecting, storing and retrieving the data.

Answer 3

double celsius_to_fahrenheit (double celsius) {return celsius * 9 / 5 + 32;}

double fahrenheit_to_celsius (double fahrenheit) {return (fahrenheit - 32) * 5 / 9;}