Chapter 2. Fundamental of ‘C’

Chapter 2. Fundamental of ‘C’

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 Question 1. Write a C program to convert Celsius to Fahrenheit and vice versa

Program :

#include <stdio.h>
void main()
{
    float fahrenheit,celsius; // Declaration of variables with type float
    int choice; // Declaration of variables with type int

    printf("1: Convert temperature from Fahrenheit to Celsius."); // Simple print statements
    printf("\n2: Convert temperature from Celsius to Fahrenheit.");
    printf("\nEnter your choice (1, 2): ");     // offering the choice to perform the task.
    scanf("%d",&choice); // run time initialization of choice variable

    if(choice ==1)     // if user select 1 than this block will execute.
    {
        printf("\nEnter temperature in Fahrenheit: ");
        scanf("%f",&fahrenheit);  // run time initialization of choice variable
        celsius= (fahrenheit - 32) / 1.8;   // logic or equation to find Celsius
        printf("Temperature in Celsius: %.2f",celsius); // printing celsius upto 2 decimal digits using %.2f
    }
    else if(choice ==2)     // if user select 2 than this block will execute.
    {
        printf("\nEnter temperature in Celsius: ");
        scanf("%f",&celsius);
        fahrenheit= (celsius*1.8)+32; // logic or equation to find Fahrenheit
        printf("Temperature in Fahrenheit: %.2f",fahrenheit);   // printing Fahrenheit upto 2 decimal digits using %.2f
    }
    else    // if user select neither 1 nor 2 than this block will execute.
    {
        printf("\nInvalid Choice !!!");
    }
}