Solved: fahrenheit to celsius formula

The task of conversion between Fahrenheit and Celsius temperatures is a common problem that programmers might encounter, especially when working on scientific calculations or weather applications. The formulas for these conversions have been known for centuries, yet implementing them in a programming language like C presents its own set of challenges and rewards. C is a general-purpose programming language that is extremely popular for a wide variety of programming tasks due to its flexibility, efficiency, and control.

The formulas for converting Fahrenheit to Celsius and vice-versa are as follows:

– To convert from Fahrenheit to Celsius, subtract 32 from the Fahrenheit temperature, then multiply the result by 5/9.

– To convert from Celsius to Fahrenheit, multiply the Celsius temperature by 9/5, then add 32 to the result.

Let’s delve into the details of how we can implement a program to perform these conversions in C.

#include <stdio.h>

int main(){
    float fahr, celsius;

    printf("Enter the temperature in Fahrenheit: ");
    scanf("%f", &fahr);

    celsius = (fahr - 32) * 5/9;
    printf("Temperature in Celsius: %.2f", celsius);

    return 0;

Understanding the Fahrenheit to Celsius conversion code

In the aforementioned C program, firstly, two floating-point variables, `fahr` and `celsius`, are declared. The `fahr` variable will hold the temperature in Fahrenheit entered by the user, and the `celsius` variable will hold the converted temperature in Celsius.

Following that, the `scanf` function is used to get the input from the user. This standard library function reads the input from the standard input (usually the keyboard). The `&fahr` argument is used to determine where to store the input value.

Library functions and their use in the program

We then apply the formula to convert Fahrenheit to Celsius and store the result in the `celsius` variable. Finally, the `printf` function, another standard library function, is used to print the converted temperature to the standard output (usually the screen). The `%.2f` inside the `printf` statement is used to print the floating point number with a precision of two decimal places.

It’s also important to note the use of `#include ` at the start of the code. This is a preprocessor command that includes the contents of stdio.h (Standard Input/Output header file) in our program. The `printf` and `scanf` functions are declared in this header file, and including it in the program enables us to use these functions.

Overall, this code is a concise and efficient solution to the problem of converting Fahrenheit to Celsius. By using the standard library functions provided by C and implementing the well-known mathematical formula, we can quickly and accurately perform the conversion.

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