Fifth Chapter Lesson-15: Conditional Control Statement Related programs

At the end of this lesson-

• 1. You will be able to write a program for determining an integer number is whether even or odd.
• 2. You will be able to write a program for determining a number is whether positive or negative.
• 3. You will be able to write a program for determining a year is whether leap year or not leap year.
• 4. You will be able to write a program for determining larger number between two numbers.
• 5. You will be able to write a program for determining LCM of two integer numbers.
• 6. You will be able to write a program for determining GCD of two integer numbers.
• 7. You will be able to write a program for determining the smallest number among three numbers.
• 8. You will be able to write a program for determining the middle number among three numbers.
• 9. You will be able to write a program for determining the largest number among three numbers.

 

1.  A program for determining an integer number is whether even or odd.

#include<stdio.h>
#include<conio.h>
main()
{
int n;
printf("Enter a number: ");
scanf("%d", &n);

if (n%2==0)     
  printf("\nThe number %d is even.",n);
else   	
  printf("\nThe number %d is odd.",n);
getch();
}

 

2.  A program for determining a number is whether positive or negative.

#include<stdio.h>
#include<conio.h>
main()
{
int n;
printf("Enter a number: ");
scanf("%d", &n);

if (n>=0)     
  printf("\nThe number %d is positive.",n);
else   	
  printf("\nThe number %d is Negative.",n);
getch();
}

 

3.  A program for determining a year is whether leap year or not leap year.

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

main()
{
int y;
printf("Enter a year:");
scanf("%d",&y);

if ((y%400==0)||((y%100!=0)&&(y%4==0)))
  printf("%d is a Leap year", y);
else
  printf("%d is not a Leap year", y);
getch();
}

 

4. A program for determining larger number between two numbers.

#include<stdio.h>
#include<conio.h>
main()
{
    int a, b;
    printf(“Enter 1st value :”);
    scanf("%d",&a);
    printf(“Enter 2nd value :”);
    scanf("%d",&b);
    
    if(a>b)
        printf("Largest Number is : %d", a);
    else
        printf("Largest Number is: %d", b);
    getch();
}

 

5.  A program for determining LCM of two integer numbers.

#include<stdio.h>
#include<conio.h>
main()
{
     int a,b,l;
     printf("Enter the two numbers: ");
     scanf("%d %d",&a,&b);
     if(a>b)
        l=a;
     else
        l=b;
     again:
     if(l%a==0 && l%b==0)
        printf("LCM of %d and %d is %d",a,b,l);
     else
     {
        l=l+1;
        goto again;
     }
    getch();
}

 

6.  A program for determining GCD of two integer numbers. 

#include<stdio.h>
#include<conio.h>
main()
{
     int a,b,s;
     printf("Enter the two numbers: ");
     scanf("%d %d",&a,&b);

     if(a<b)
        s=a;
     else
        s=b;

     again:
     if(a%s==0 && b%s==0)
       printf("GCD of %d and %d is %d",a,b,s);
     else
     {
        s=s-1;
        goto again;
     }
     getch();
}

 

7.  A program for determining the smallest number among three numbers.

#include<stdio.h>
#include<conio.h>
main()
{
    int a,b,c;
    printf("Enter three integer numbers:");
    scanf("%d  %d  %d", &a, &b, &c);

    if(a<b)
    {
        if(a<c)
            printf("\n Smallest number is: %d", a);
        else
            printf("\n Smallest number is: %d", c);
    }
    else
    {
        if(b<c)
            printf("\n Smallest number is: %d", b);
        else
           printf("\n Smallest number is: %d", c);
    }
    getch();
}

 

8.  A program for determining the middle number among three numbers.

#include<stdio.h>
#include<conio.h>
main()
{
    int a,b,c;
    printf("Enter three integer numbers:");
    scanf("%d  %d  %d", &a, &b, &c);

    if(a>b)
    {
         if(b>c)
              printf("%d is middle one",b);
         else if(c>a)
              printf("%d is middle one",a);
         else
              printf("%d is middle one",c);
    }
    else
    {
         if(b<c)
              printf("%d is middle one",b);
         else if(c<a)
              printf("%d is middle one",a);
         else
              printf("%d is middle one",c);
    }
 getch();
}

 

9.  A program for determining the largest number among three numbers.

#include<stdio.h>
#include<conio.h>
main()
{
    int a,b,c;
    printf("Enter three integer numbers:");
    scanf("%d  %d  %d", &a, &b, &c);

    if(a>b)
    {
        if(a>c)
            printf("\n Largest number is: %d", a);
        else
            printf("\n Largest number is: %d", c);
    }
    else
    {
        if(b>c)
            printf("\n Largest number is: %d", b);
        else
           printf("\n Largest number is: %d", c);
    }
    getch();
}

 

Lesson Evaluation-

Knowledge Based Questions:

Comprehension Based Questions:

Creative Questions:

Multiple Choice Questions:

 

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Written by,

• Mizanur Rahman (Mizan)
• Lecturer of ICT, Shaheed Bir Uttam Lt. Anwar Girls’ College ,Dhaka Cantonment
• Author at www.edupointbd.com
• Software Engineer at mands IT
• Former Lecturer of ICT, Cambrian College, Dhaka
• Email: mizanjust@gmail.com
• Cell: 01724351470