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C program to convert Celsius to Fahrenheit

In this article, you will learn the C program to convert units of measurement from Celsius to Fahrenheit. Such a type of program plays an important role in the most scientific applications, as it is the most widely used temperature scale throughout the world. The Fahrenheit scale is mostly used in the United States.

In the Celsius scale, the boiling point of water is 100°C, and the freezing point is at 0°C, while in the Fahrenheit scale the boiling point of water is measured at 212°F and freezing point at 32°F.

celsius to fahrenheit

Formula

fahrenheit = (celsius * 9 / 5) + 32

Algorithm

  1. Take temperature input from the user or define the temperature in a Celsius unit.
  2. Apply the above formula to convert Celsius to Fahrenheit.
  3. Print the value in Fahrenheit.




C program to convert Celsius to Fahrenheit

Here is a simple program to convert Celsius to Fahrenheit using the C programming language. The given program asks the user to enter the temperature in Celsius. After getting the temperature in Celsius from the user, the C program converts it to Fahrenheit.

#include<stdio.h>
int main()
{
   float fahrenheit, celsius;

    /* Input temperature in Celsius */
    printf("Enter temperature in Celsius: ");
    scanf("%f", &celsius);

    fahrenheit =( (celsius*9)/5)+32;
    printf("\n\nTemperature in Fahrenheit is:  %f",fahrenheit);
    return (0);
}
Output 1
Enter temperature in Celsius: 42.5

Temperature in Fahrenheit is:  108.500000

Output 2
Enter temperature in Celsius: 62


Temperature in Fahrenheit is:  143.600006




C program to convert Celsius to Fahrenheit using a function

Here, we have defined a function to convert from Celsius to Fahrenheit. In this first, we ask the user to provide a temperature in Celsius. After getting the temperature in Celsius from the user, call the defined function CelsiusToFahrenheit() to convert Celsius to Fahrenheit.

#include <stdio.h>
float CelsiusToFahrenheit(float c)
{
    return ((c * 9.0 / 5.0) + 32.0);
}
int main()
{
    float celsius, fahrenheit;
    printf("Enter temperature in Celsius: ");
    scanf("%f", &celsius);
    //calling function 
    fahrenheit = CelsiusToFahrenheit(celsius);
    printf("%.2f Celsius = %.2f Fahrenheit", celsius, fahrenheit);
    return 0;
}
Output 1
Enter temperature in Celsius: 47
47.00 Celsius = 116.60 Fahrenheit




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