Fifth Chapter Lesson-13: Basic Mathematical problem related program

Mizanur Rahman

At the end of this lesson-

  • 1. You will be able to write a program for adding two numbers.
  • 2. You will be able to write a program for subtracting two numbers.
  • 3. You will be able to write a program for multiplying two numbers.
  • 4. You will be able to write a program for dividing two numbers.
  • 5. You will be able to write a program for converting temperature from Celsius to Fahrenheit.
  • 6. You will be able to write a program for converting temperature from Fahrenheit to Celsius.
  • 7. You will be able to write a program for determining area of a triangle where base and height have been given.
  • 8. You will be able to write a program for determining area of a triangle where three arms have been given. 
  • 9. You will be able to write a program for determining area of a rectangle.
  • 10. You will be able to write a program for determining area of a circle.

 

1. A program for adding two numbers.

#include<stdio.h>
#include<conio.h>
main() 
{
  int a, b, c;
  printf(“ Enter Two numbers: “);
  scanf(“%d %d”,&a,&b);
  c = a+b;
  printf("Summation = %d",c);
  getch();
}

Practice: Write a program for adding five integer numbers.

 

2. A program for subtracting two numbers.

#include<stdio.h>
#include<conio.h>
main()
{
    int a, b, c;
    printf(“ Enter Two numbers: “);
    scanf(“%d %d”,&a,&b);
    c = a-b;
    printf("Subtraction= %d",c);
    getch();
}

 

3. A program for multiplying two numbers.

#include<stdio.h>
#include<conio.h>
main()
{
    int a, b, c;
    printf(“ Enter Two numbers: “);
    scanf(“%d %d”,&a,&b);
    c= a*b;
    printf("Multiplication= %d", c);
    getch();
}

Practice: Write a program for multiplying five integer numbers.

 

4. A program for dividing two numbers.

#include<stdio.h>
#include<conio.h>
main()
{
    int a, b;
    float c;
    printf("Enter Two numbers: ");
    scanf("%d %d",&a,&b);
    c= a/b;
    printf("Division= %f",c);
    getch();
}

Practice: Write a program for determining average of five integer numbers.

 

5. A program for converting temperature from Celsius to Fahrenheit.

Relation among different temperature scale C/5 = F-32 / 9 = K-273 / 5

#include<stdio.h>
#include<conio.h>
main()
{
    int c, f;
    printf("Enter celcious temperature :");
    scanf("%d",&c);
    f=9*c/5+32;
    printf("Ferhenheight temperature:%d”,f);
    getch();
}

Practice: Write a programt for converting temperature from Celsius to Kelvin.

 

6. A program for converting temperature from Fahrenheit to Celsius.

Relation among different temperature scale C/5 = F-32 / 9 = K-273 / 5

#include<stdio.h>
#include<conio.h>
main()
{
    int c, f;
    printf("Enter Ferenheight temperature :");
    scanf("%d",&f);
    c=5*(f-32)/9;
    printf("Celcious temperature:%d”,c);
    getch();
}

Practice: Write a program for converting temperature from Fahrenheit to Kelvin.

 

7. A program for determining area of a triangle where base and height have been given.

Theory for determining the area of a triangle where base and height of triangle have been given,  Area=1/2×base×height

#include<stdio.h>
#include<conio.h>
main()
{
    int b,h;
    float area;
    printf("Enter Base & Height:");
    scanf("%d %d",&b,&h);
    area=.5*b*h;
    printf("\nThe area is %.2f",area);
    getch();
 }

 

8. A program for determining area of a triangle where three arms have been given. 

Theory for determining the area of a triangle where three arms of triangle are a, b and c,                           Area= √(s(s-a)(s-b)(s-c))   [ s= half of perimeter]

half of perimeter, s=(a+b+c)/2

#include<stdio.h>
#include<conio.h>
#include<math.h>
main()
{
    int a, b, c;
    float s, area;
    printf("Enter three integer values:");
    scanf("%d %d %d", &a,&b,&c);
    s = (a + b + c)/2;
    area = sqrt(s*(s-a)*(s-b)*(s-c));
    printf("Area of triangle is = %f", area);
    getch();
}

 

9. A program for determining area of a rectangle.

Theory for determining area of rectangle where length and width have been given, Area=length×width  

#include<stdio.h>
#include<conio.h>
main()
{
    int l,w,area;
    printf("Enter the length & width: ");
    scanf("%d %d",&l,&w);
    area=l*w;
    printf("\nThe area is %d",area);
    getch();
}

Practice: Write a program for determining area of a parallelogram.

Practice: Write a program for determining area of a square.

 

10. A program for determining area of a circle.

Theory for determining area of a circle where radius r, Area=πr2

#include<stdio.h>
#include<conio.h>
main ( )
{
    int r;
    float area;
    printf ("Enter integer value for radius:");
    scanf ("%d", &r) ;
    area = 3.1416*r*r;
    printf("\n Area of circle =%f", area);
    getch();
}

 

 

Lesson Evaluation-

Knowledge Based Questions:

Comprehension Based Questions:

Creative Questions:

Multiple Choice Questions:

 

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