C program to convert a given temperature value from Fahrenheit to Centigrade and vice versa?

 Write a C program to convert a given temperature value from Fahrenheit to Centigrade and vice versa?

        In this example we will learn how to convert a given temperature in Fahrenheit to Centigrade and to convert given  temperature value from Centigrade to Fahrenheit depending on the choice of the user. 

            To solve this program we should have basic knowledge in c and most importantly a clear concept on :

• Switch Statement

            And we must know the formula of conversion from Fahrenheit to Centigrade(Celsius) and Centigrade(Celsius) to Fahrenheit.

• Fahrenheit To Centigrade
• Centigrade To Fahrenheit

PROGRAM    

#include<stdio.h>

#include<conio.h>

void main()

{

    float f,c;

    int ch;

    printf("CONVERT");

    printf("\n1. Fahrenheit to Celsius.");

    printf("\n2. Celsius to Fahrenheit\n");

    printf("\nEnter your choice (1|2):");

    scanf("%d",&ch);    

    switch(ch)

    {

    case 1:

        printf("Enter the temperature in Fahrenheit :");

        scanf("%f",&f);    //to enter temperature in fahrenheit.

        c=(f-32)/1.8;    //formula to convert fahrenheit to centigrade

        printf("Conversion of %f F to Celsius is : %f C",f,c);

        break;

    case 2:

        printf("Enter the temperature in Celsius :");

        scanf("%f",&c);    //to enter temperature in Centigrade

        f=(c*1.8)+32;    //formula to convert centigrade to fahrenheit

        printf("Conversion of %f C to Celsius is : %f F",c,f);

        break;

    deafult:

        printf("Invalid Input!!!!");

    }

    getch();

}

OUTPUT:   

Write a C program to convert given temperature in Fahrenheit to Centigrade(Celsius)?

                In this example we will learn how to convert a given temperature in Fahrenheit to Centigrade. Lets have a look at the code.

PROGRAM

#include<stdio.h>

#include<conio.h>

void main()

{

    float f,c;

    printf("Enter temperatur in Fahrenheit : ");

    scanf("%f",&f);    

    c=(f-32)/1.8;

    printf("Conversion of %f F to Celsius is : %f C",f,c);

    getch();

}

OUTPUT

• SWITCH STATEMENT:

                The switch statement is a multiway decision making statement that test whether the value of a given expression matches one of a number of constant integer values, and branches accordingly.

        Certain Cases:

1. Only one variable is tested, all branches must depend on the value of that variable. The variable must be an integral type i.e, integer,long,short or char.
2. It's possible values of the variable can control a single branch, default branch may optionally be used to trap all unspecified cases.

        Syntax:

              

                switch(expression)

               {

                case constant 1:

                        statement 1;

                        statement 2;

                        break;   

                 case constant 2:

                        statement 1;

                        statement 2;

                        break;

                  default:

                        statement 1;

                        statement 2;

                  }

                      

                    The expression is an integer expression or character. Constant 1, Constant 2,..... are constants which values must be unique within a switch statement. Statement 1, Statement 2,.... are statement lists which may contain zero statements or multiple statements depending on the need of the program. It is to be noted that case constant 1, case constant 2,... ends with a semicolon(:). If the value of the expression matches with any of the constant values then the statement inside each case is executed. The break statement at the end of each statement signals the end of particular case which causes an exit from the switch statement. The default is an optional case, when the value of the expression doesn't match with any of the constant values then default case is executed if present in the switch statement.

• Fahrenheit To Centigrade(Celsius):

            To convert centigrade(Celsius) from Fahrenheit we have to subtract 32 from the value of Fahrenheit and then multiply that value with 5/9.

                The Formula is:

                        C=(F-32)*5/9

                where C stands for Cantigrade(Celsius) and F stands for Fahrenheit.

• Centigrade(Celsius) To Fahrenheit:

            To convert Fahrenheit from Centigrade(Celsius) we have to multiply 9/5 with the value of Centigrade(celsius) and then adding that value with 32.