Tag: square

Using Macros Find Area and Perimeter of Triangle, Square, Circle: C Program

Problem State: Write macro definitions with arguments for calculation of area and perimeter of a triangle, a square and a circle.

Store these macro definitions in a file called “areaperi.h”. Include this file in your program, and call the macro definitions for calculating area and perimeter for different squares, triangles and circles.

Related Read:
Switch Case Default In C Programming Language
Macros With Arguments: C Program
do-while Loop In C Programming Language

Problem Statement Analysis

1. We need to write macro definitions which accept arguments.
2. We need to write macro definitions to calculate area and perimeter of triangle, square and circle.
3. We need to write macro definition inside a separate file called areaperi.h and then include this header file into our source file and make use of the macro definitions to calculate area and perimeter of Triangle, Square and Circle for various user inputs.

Video Tutorial: Using Macros Find Area and Perimeter of Triangle, Square, Circle: C Program


[youtube https://www.youtube.com/watch?v=lR50ONlpDNw]

YouTube Link: https://www.youtube.com/watch?v=lR50ONlpDNw [Watch the Video In Full Screen.]

Source Code: Using Macros Find Area and Perimeter of Triangle, Square, Circle: C Program

areaperi.h

#include<math.h>

#define TRI_PERI(a, b, c) (a + b + c)
#define SP(a, b, c) ( (a + b + c) / 2.0 )
#define TRI_AREA(a, b, c) ( sqrt( SP(a,b,c) * \
                                 ( SP(a,b,c) - a ) *\
                                  (SP(a,b,c) - b) * \
                                  (SP(a,b,c) - c)) )

#define SQR_PERI(s) (4 * s)
#define SQR_AREA(s) (s * s)

#define C_PERI(r) (2 * M_PI * r)
#define C_AREA(r) (M_PI * r * r)

main.c

#include<stdio.h>
#include "areaperi.h"

int main()
{
    float a, b, c, side, radius;
    int choice, repeat;

    do
    {
        printf("1. Area of Triangle\n");
        printf("2. Perimeter of Triangle\n");
        printf("3. Area of Square\n");
        printf("4. Perimeter of Square\n");
        printf("5. Area of Circle\n");
        printf("6. Perimeter of Circle\n");

        printf("\nEnter your choice\n");
        scanf("%d", &choice);

        switch(choice)
        {
            case 1: printf("Enter 3 sides of a Triangle\n");
                    scanf("%f%f%f", &a, &b, &c);
                    printf("Area of Trianlge is %0.2f\n", TRI_AREA(a,b,c));
                    break;
            case 2: printf("Enter 3 sides of a Triangle\n");
                    scanf("%f%f%f", &a, &b, &c);
                    printf("Perimeter of Trianlge is %0.2f\n", TRI_PERI(a,b,c));
                    break;
            case 3: printf("Enter length of side of Square\n");
                    scanf("%f", &side);
                    printf("Area of Square is %0.2f", SQR_AREA(side));
                    break;
            case 4: printf("Enter length of side of Square\n");
                    scanf("%f", &side);
                    printf("Perimeter of Square is %0.2f", SQR_PERI(side));
                    break;
            case 5: printf("Enter Radius of Circle\n");
                    scanf("%f", &radius);
                    printf("Area of Circle is %0.2f\n", C_AREA(radius));
                    break;
            case 6: printf("Enter Radius of Circle\n");
                    scanf("%f", &radius);
                    printf("Circumference of Circle is %0.2f\n", C_PERI(radius));
                    break;
            default: printf("\nPlease enter valid choice\n");
        }

        printf("\n\nDo you want to continue? Ans: 0 or 1\n");
        scanf("%d", &repeat);

        printf("\n");

    }while(repeat);

    return 0;
}

Output:
1. Area of Triangle
2. Perimeter of Triangle
3. Area of Square
4. Perimeter of Square
5. Area of Circle
6. Perimeter of Circle

Enter your choice
1
Enter 3 sides of a Triangle
5
6
9
Area of Trianlge is 14.14

Do you want to continue? Ans: 0 or 1
1

1. Area of Triangle
2. Perimeter of Triangle
3. Area of Square
4. Perimeter of Square
5. Area of Circle
6. Perimeter of Circle

Enter your choice
2
Enter 3 sides of a Triangle
5
6
9
Perimeter of Trianlge is 20.00

Do you want to continue? Ans: 0 or 1
1

1. Area of Triangle
2. Perimeter of Triangle
3. Area of Square
4. Perimeter of Square
5. Area of Circle
6. Perimeter of Circle

Enter your choice
3
Enter length of side of Square
5
Area of Square is 25.00

Do you want to continue? Ans: 0 or 1
1

1. Area of Triangle
2. Perimeter of Triangle
3. Area of Square
4. Perimeter of Square
5. Area of Circle
6. Perimeter of Circle

Enter your choice
4
Enter length of side of Square
5
Perimeter of Square is 20.00

Do you want to continue? Ans: 0 or 1
1

1. Area of Triangle
2. Perimeter of Triangle
3. Area of Square
4. Perimeter of Square
5. Area of Circle
6. Perimeter of Circle

Enter your choice
5
Enter Radius of Circle
5.5
Area of Circle is 95.03

Do you want to continue? Ans: 0 or 1
1

1. Area of Triangle
2. Perimeter of Triangle
3. Area of Square
4. Perimeter of Square
5. Area of Circle
6. Perimeter of Circle

Enter your choice
6
Enter Radius of Circle
5.5
Circumference of Circle is 34.56

Do you want to continue? Ans: 0 or 1
0

Formulas To Calculate Area and Perimeter

We’ve written the formula to calculate area and perimeter inside areaperi.h file, as macro expansion. Below we list all the formulas we’re using in our program:

Perimeter of a Triangle: ( a + b + c)
where: a, b, and c are lengths of sides of the triangle.

Semi-perimeter of a Triangle: ( (a + b + c) / 2 )
where: a, b, and c are lengths of sides of the triangle.

Area of a Triangle: sqrt( S x (S – a) x (S – b) x (S – c) )
where: a, b, and c are lengths of sides of the triangle.
S is the semi-perimeter.

Perimeter of Square: ( 4 x side )
where: side is the length of side of the square.

Area of Square: ( side x side)
where: side is the length of side of the square.

Perimeter or Circumference of Circle: ( 2 x PI x r )
Area of a Circle: ( PI x r x r )
where: r is radius of the circle.
PI is approximately equal to 3.14

Note: M_PI is a macro present inside math.h library file and has value of PI.

Related Read:
C Program To Find Area, Perimeter and Semi-perimeter: Valid Triangle
C Program To Calculate Perimeter, Diagonal of a Square using its Side
C Program To Find Area and Circumference of Circle using Pointer

Logic

We’ve included areaperi.h into main.c file. Now we can make use of all the macros we’ve defined inside areaperi.h

Users are provided with options to select the preferred operations like:
1. Area of Triangle
2. Perimeter of Triangle
3. Area of Square
4. Perimeter of Square
5. Area of Circle
6. Perimeter of Circle

Based on user selection appropriate block of code inside switch-case is executed, wherein we place the relevant macro template to get the desired result.

Note: We can continue writing macro expansion in next line by making use of macro continuation operator(\). You can see that we’ve broken the line and written the code in next line inside macro expansion of TRI_AREA.

For list of all c programming interviews / viva question and answers visit: C Programming Interview / Viva Q&A List

For full C programming language free video tutorial list visit:C Programming: Beginner To Advance To Expert

C Program To Find Sum of Squares of Digits using Recursion

Write a C program to find sum of squares of digits of a positive integer number input by the user, using recursive function.

Example:

If user inputs num value as 123. Then we fetch the individual digits present in 123 i.e., 3, 2 and 1, square it and add it to get the final result.

i.e., (3 x 3) + (2 x 2) + (1 x 1) = 14.

So, sum of squares of digits of 123 is 14.

Video Tutorial: C Program To Find Sum of Squares of Digits using Recursion


[youtube https://www.youtube.com/watch?v=7YaJ2pIkzKc]

YouTube Link: https://www.youtube.com/watch?v=7YaJ2pIkzKc [Watch the Video In Full Screen.]

Source Code: C Program To Find Sum of Squares of Digits using Recursion

#include<stdio.h>

int square(int num)
{
    if(num == 0)
        return 0;
    else
        return( (num%10) * (num%10) + square(num/10) );
}

int main()
{
    int num;

    printf("Enter a positive integer number:\n");
    scanf("%d", &num);

    printf("Sum of squares of digits of %d is %d.\n", num, square(num));

    return 0;
}

Output:
Enter a positive integer number:
123
Sum of squares of digits of 123 is 14.

Source Code: C Program To Find Sum of Squares of Digits using Recursion and pow() method

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

int square(int num)
{
    if(num == 0)
        return 0;
    else
        return( pow((num%10), 2) + square(num/10) );
}

int main()
{
    int num;

    printf("Enter a positive integer number:\n");
    scanf("%d", &num);

    printf("Sum of squares of digits of %d is %d.\n", num, square(num));

    return 0;
}

Output:
Enter a positive integer number:
123
Sum of squares of digits of 123 is 14.

Here we are making use of pow() method present inside math.h library file. pow() takes base value as first argument and exponent value as its second argument.

Source Code: C Program To Find Sum of Squares of Digits using Recursion, Ternary/Conditional Operator and pow() method

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

int square(int);

int main()
{
    int num;

    printf("Enter a positive integer number:\n");
    scanf("%d", &num);

    printf("Sum of squares of digits of %d is %d.\n", num, square(num));

    return 0;
}

int square(int num)
{
    return( (num == 0) ? 0 : ( pow((num % 10), 2) + square(num/10) ));
}

Output 1:
Enter a positive integer number:
123
Sum of squares of digits of 123 is 14.

Output 2:
Enter a positive integer number:
2103
Sum of squares of digits of 2103 is 14.

Output 3:
Enter a positive integer number:
456
Sum of squares of digits of 456 is 77.

Output 4:
Enter a positive integer number:
2020
Sum of squares of digits of 2020 is 8.

Output 5:
Enter a positive integer number:
2021
Sum of squares of digits of 2021 is 9.

To know more about Ternary or Conditional Operator visit:
Ternary Operator / Conditional Operator In C.

Dry Run: Example

Lets assume that user has input num value as 123.

num(num%10)2num/10(num%10)2+square(num/10)
123(3)2129+square(12)
12(2)214+square(1)
1(1)201+square(0)

Value Returning – Control Shifting back.

Return ValueToResult
return 0;square(0)1+0=1
1square(1)4+1=5
5square(12)9+5=14

So, sum of squares of digits of 123 is 14.

For list of all c programming interviews / viva question and answers visit: C Programming Interview / Viva Q&A List

For full C programming language free video tutorial list visit:C Programming: Beginner To Advance To Expert

C Program To Calculate Perimeter, Diagonal of a Square using its Side

Lets write a C program to calculate area, perimeter and diagonal of a square by using length of its side. We ask the user to input the length of its side.

Related Read:
C Program To Calculate Area of a Square using its Side
C Program To Calculate Area of a Square using its Diagonal

Formula To Calculate Area, Perimeter and Diagonal of a Square using its side

diagonal = sqrt(2) x side;

area = ( diagonal x diagonal ) / 2.0
OR
area = ( diagonal x diagonal ) * 0.5
OR
area = side x side;

Perimeter = 4 x side;

Note: All the sides of a square are equal. Both the diagonals of the square are of equal length.

diagonal of square using its side

Expected Output for the Input

User Input:
Enter length of side of the Square
10.5

Output:
Area of the Square is 110.250000
Perimeter of the Square is 42.000000
Diagonal of the Square is 14.849242

Video Tutorial: C Program To Calculate Perimeter, Diagonal of a Square using its Side


[youtube https://www.youtube.com/watch?v=QXO-lF-EbvA]

YouTube Link: https://www.youtube.com/watch?v=QXO-lF-EbvA [Watch the Video In Full Screen.]

Source Code: C Program To Calculate Perimeter, Diagonal of a Square using its Side

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

int main()
{
    float perimeter, diagonal, side, area;

    printf("Enter length of side of the Square\n");
    scanf("%f", &side);

    perimeter = 4 * side;
    diagonal  = sqrt(2) * side;
    area      = side * side;

    printf("Area of the Square is %f\n", area);
    printf("Perimeter of the Square is %f\n", perimeter);
    printf("Diagonal of the Square is %f\n", diagonal);

    return 0;
}

Output 1:
Enter length of side of the Square
10
Area of the Square is 100.000000
Perimeter of the Square is 40.000000
Diagonal of the Square is 14.142136

Output 2:
Enter length of side of the Square
5
Area of the Square is 25.000000
Perimeter of the Square is 20.000000
Diagonal of the Square is 7.071068

Output 3:
Enter length of side of the Square
12.2
Area of the Square is 148.839996
Perimeter of the Square is 48.799999
Diagonal of the Square is 17.253405

Output 4:
Enter length of side of the Square
10.5
Area of the Square is 110.250000
Perimeter of the Square is 42.000000
Diagonal of the Square is 14.849242

Output 5:
Enter length of side of the Square
3.2
Area of the Square is 10.240001
Perimeter of the Square is 12.800000
Diagonal of the Square is 4.525484

For list of all c programming interviews / viva question and answers visit: C Programming Interview / Viva Q&A List

For full C programming language free video tutorial list visit:C Programming: Beginner To Advance To Expert

C Program To Calculate Area of a Square using its Diagonal

Lets write a C program to find area of a square by using length of its diagonal. We ask the user to input the length of its diagonal.

Related Read:
C Program To Calculate Area of a Square using its Side

Formula To Calculate Area of Square using its diagonal

area = ( diagonal x diagonal ) / 2.0
OR
area = ( diagonal x diagonal ) * 0.5

Note: All the sides of a square are equal. Both the diagonals of the square are of equal length.

area of square using its diagonal

Expected Output for the Input

User Input:
Enter length of diagonal of a Square
15.2

Output:
Area of the Square is 115.52

Video Tutorial: C Program To Calculate Area of a Square using its Diagonal


[youtube https://www.youtube.com/watch?v=7TCCRv174iE]

YouTube Link: https://www.youtube.com/watch?v=7TCCRv174iE [Watch the Video In Full Screen.]

Source Code: C Program To Calculate Area of a Square using its Diagonal

#include < stdio.h >

int main()
{
    float area, diagonal;

    printf("Enter length of diagonal of a Square\n");
    scanf("%f", &diagonal);

    area = (diagonal * diagonal) * 0.5;

    printf("Area of the Square is %0.2f\n", area);

    return 0;
}

Output 1:
Enter length of diagonal of a Square
9
Area of the Square is 40.50

Output 2:
Enter length of diagonal of a Square
5
Area of the Square is 12.50

Output 3:
Enter length of diagonal of a Square
10
Area of the Square is 50.00

Output 4:
Enter length of diagonal of a Square
10.5
Area of the Square is 55.13

Output 5:
Enter length of diagonal of a Square
12.2
Area of the Square is 74.42

For list of all c programming interviews / viva question and answers visit: C Programming Interview / Viva Q&A List

For full C programming language free video tutorial list visit:C Programming: Beginner To Advance To Expert

C Program To Calculate Area of a Square using its Side

Lets write a C program to find area of a square by using length of its side. We ask the user to input the length of its side.

Formula To Calculate Area of Square using its side

area = side x side.

Note: All the sides of a square are equal.

Expected Output for the Input

User Input:
Enter the length of side of a square
5

Output:
Area of the Square is 25.00

Video Tutorial: C Program To Calculate Area of a Square using its Side


[youtube https://www.youtube.com/watch?v=V-nCBIaMmYQ]

YouTube Link: https://www.youtube.com/watch?v=V-nCBIaMmYQ [Watch the Video In Full Screen.]

Source Code: C Program To Calculate Area of a Square using its Side

#include < stdio.h >

int main()
{
    float area, side;

    printf("Enter the length of side of a square\n");
    scanf("%f", &side);

    area = side * side;

    printf("Area of the Square is %0.2f \n", area);

    return 0;
}

Output 1:
Enter the length of side of a square
3
Area of the Square is 9.00

Output 2:
Enter the length of side of a square
4
Area of the Square is 16.00

Output 3:
Enter the length of side of a square
5
Area of the Square is 25.00

Output 4:
Enter the length of side of a square
6
Area of the Square is 36.00

Output 5:
Enter the length of side of a square
8
Area of the Square is 64.00

For list of all c programming interviews / viva question and answers visit: C Programming Interview / Viva Q&A List

For full C programming language free video tutorial list visit:C Programming: Beginner To Advance To Expert