Question

1. Please write a program to calculate the area of a circle. Area =3.14*Radius*Radius. Input Radius.
2. Please write a program to calculate the area of a rectangle. Area =Width*Length. Input Width and Length.
3. Please write a program to covert Fahrenheit degree to Celsius degree. The formula is

C=(F-32)*5/9. Input Fahrenheit degree.

4. Please write a program to covert Celsius degree to Fahrenheit degree. The formula is F=C*9/5+32. Input Celsius degree.

Answer 1

//AREA OF CIRCLE

#include <stdio.h>
#include <math.h>

int main()
{
float radius, area;

printf("Enter the radius of a circle\n");

scanf("%f", &radius);

area = 3.14*radius*radius;

printf("Area of the circle = %.2f\n", area);

return 0;
}

// AREA OF RECTANGLE

#include<stdio.h>
#include<conio.h>

int main() {
   int length, width, area;

   printf("\nEnter the Length of Rectangle : ");
   scanf("%d", &length);

   printf("\nEnter the Widthof Rectangle : ");
   scanf("%d", &width);

   area = length * width;
   printf("\nArea of Rectangle : %d", area);

   return (0);
}

// Celsius to Fahrenheit

#include <stdio.h>

int main()
{
    float celsius, fahrenheit;

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

    fahrenheit = (celsius * 9 / 5) + 32;

    printf("%.2f Celsius = %.2f Fahrenheit", celsius, fahrenheit);

    return 0;
}

// Fahrenheit to Celsius

#include<stdio.h>

int main()
{
    float fahrenheit, celsius ;

    printf("Enter a temp in fahrenheit: ");
    scanf("%f", &fahrenheit);

    celsius = (fahrenheit- 32)*(5.0/9);

    printf("%.2f°F is same as %.2f°C", fahrenheit, celsius );

    return 0;
}