C programs

Wednesday, May 16, 2018

C program to find whether the given alphabet is a vowel or consonant.

Program code

#include <stdio.h>

#include <conio.h>

void main()

{

char letter;

clrscr();

printf("Please input an alphabet.\n");

scanf("%c",&letter);

if ((letter=='a')||(letter=='e')||(letter=='i')||(letter=='o')||(letter=='u'))

printf("This alphabet is a vowel.\n");

else

printf("This alphabet is a consonant.\n");

getch();

}

Example of output

Please input an alphabet.

This alphabet is a consonant.

C program to check whether the given letter is small letter or capital letter.

Program code

#include <stdio.h>

#include <conio.h>

void main()

{

char letter;

clrscr();

printf("Please input an alphabet.\n");

scanf("%c",&letter);

switch(letter)

{

case 'a':printf("You have typed small letter.\n");

break;

case 'b':printf("You have typed small letter.\n");

break;

case 'c':printf("You have typed small letter.\n");

break;

case 'd':printf("You have typed small letter.\n");

break;

case 'e':printf("You have typed small letter.\n");

break;

case 'f':printf("You have typed small letter.\n");

break;

case 'g':printf("You have typed small letter.\n");

break;

case 'h':printf("You have typed small letter.\n");

break;

case 'i':printf("You have typed small letter.\n");

break;

case 'j':printf("You have typed small letter.\n");

break;

case 'k':printf("You have typed small letter.\n");

break;

case 'l':printf("You have typed small letter.\n");

break;

case 'm':printf("You have typed small letter.\n");

break;

case 'n':printf("You have typed small letter.\n");

break;

case 'o':printf("You have typed small letter.\n");

break;

case 'p':printf("You have typed small letter.\n");

break;

case 'q':printf("You have typed small letter.\n");

break;

case 'r':printf("You have typed small letter.\n");

break;

case 's':printf("You have typed small letter.\n");

break;

case 't':printf("You have typed small letter.\n");

break;

case 'u':printf("You have typed small letter.\n");

break;

case 'v':printf("You have typed small letter.\n");

break;

case 'w':printf("You have typed small letter.\n");

break;

case 'x':printf("You have typed small letter.\n");

break;

case 'y':printf("You have typed small letter.\n");

break;

case 'z':printf("You have typed small letter.\n");

break;

case 'A':printf("You have typed capital letter.\n");

break;

case 'B':printf("You have typed capital letter.\n");

break;

case 'C':printf("You have typed capital letter.\n");

break;

case 'D':printf("You have typed capital letter.\n");

break;

case 'E':printf("You have typed capital letter.\n");

break;

case 'F':printf("You have typed capital letter.\n");

break;

case 'G':printf("You have typed capital letter.\n");

break;

case 'H':printf("You have typed capital letter.\n");

break;

case 'I':printf("You have typed capital letter.\n");

break;

case 'J':printf("You have typed capital letter.\n");

break;

case 'K':printf("You have typed capital letter.\n");

break;

case 'L':printf("You have typed capital letter.\n");

break;

case 'M':printf("You have typed capital letter.\n");

break;

case 'N':printf("You have typed capital letter.\n");

break;

case 'O':printf("You have typed capital letter.\n");

break;

case 'P':printf("You have typed capital letter.\n");

break;

case 'Q':printf("You have typed capital letter.\n");

break;

case 'R':printf("You have typed capital letter.\n");

break;

case 'S':printf("You have typed capital letter.\n");

break;

case 'T':printf("You have typed capital letter.\n");

break;

case 'U':printf("You have typed capital letter.\n");

break;

case 'V':printf("You have typed capital letter.\n");

break;

case 'W':printf("You have typed capital letter.\n");

break;

case 'X':printf("You have typed capital letter.\n");

break;

case 'Y':printf("You have typed capital letter.\n");

break;

case 'Z':printf("You have typed capital letter.\n");

break;

default:printf("Invalid alphabet.\n");

break;

}

getch();

}

Example of output

Please input an alphabet.

You have typed small letter.

C program to print a fractional number after rounding it to two decimal places.

Program code

#include <stdio.h>

#include <conio.h>

void main()

{

float a;

clrscr();

printf("Please insert a number.\n");

scanf("%f",&a);

printf("The number you have entered is %.2f",a);

getch();

}

Example of output

Please insert a number.

7.7777

The number you have entered is 7.78

C program to swap two numbers.

Program code

#include <stdio.h>

#include <conio.h>

void main()

{

int a=0, b=0, temp=0;

clrscr();

printf(“Please input a number to store in a.\n”);

scanf(“%d”,&a);

printf(“Please input a number to store in b.\n”);

scanf(“%d”,&b);

printf(“Before swapping.\na=%d\nb=%d\n”, a,b);

/*displays the values of a and b before swapping.*/

/* swapping starts */

temp=a;

a=b;

b=temp;

/*swapping ends*/

printf(“After swapping.\na=%d\nb=%d\n”, a,b);

/*displays the values of a and b after swapping.*/

getch();

}

Example of output

Please input a number to store in a.

Please input a number to store in b.

Before swapping.

a=98

b=34

After swapping.

a=34

b=98

C program to display the reverse of the given number.

Program code

#include <stdio.h>

#include <conio.h>

void main()

{

long int temp=0, number=0, reverse=0;

clrscr();

printf(“Please input a whole number to get its reverse.\n”);

scanf(“%ld”,&number);

for (temp=number;temp>0;temp=temp/10)

reverse=(reverse*10)+(temp%10);

printf(“The reverse of %ld is %ld\n”, number, reverse);

getch();

}

Example of output

Please input a whole number to get its reverse.

6754

The reverse of 6754 is 4576

C program to find whether the given number is prime or composite

Program code

#include <stdio.h>

#include <conio.h>

void main()

{

int question=0, i=2;

clrscr();

printf(“Please input a positive integer to find out whether it is a prime number or composite number.\n”);

scanf(“%d”,&question);

if (question==1)

{

printf(“%d is neither prime nor composite.\n”, question);

goto stop;

}

if (question==2)

{

printf(“%d is a prime number.\n%d is the only even prime number.\n”,question,question);

goto stop;

}

{

if (question%i==0)

{

printf(“%d is a composite number.\n”,question);

goto stop;

}

i++;

}

while(i<question);

printf(“%d is a prime number.\n”,question);

stop:

getch();

}

Example of output

Please input a positive integer to find out whether it is a prime number or composite number.

3 is a prime number.

C program to check whether the given number is palindrome.

Program code

#include <stdio.h>

#include <conio.h>

void main()

{

long int temp=0, number=0, reverse=0;

clrscr();

printf(“Please input a whole number to find out whether it is a palindrome.\n”);

scanf(“%ld”,&number);

for (temp=number;temp>0;temp=temp/10)

reverse=(reverse*10)+(temp%10);

if (number==reverse)

printf(“%ld is palindrome.\n”,number);

else

printf(“%ld is not a palindrome.\n”,number);

getch();

}

Example of output

Please input a whole number to find out whether it is a palindrome.

1221

1221 is palindrome.

C program to display integers from one to ten.

Program code

#include <stdio.h>

#include <conio.h>

void main()

{

int i=1;

clrscr();

while (i<=10)

{

printf("%d\n",i);

i++;

}

getch();

}

Output

C program to check whether the given number is odd or even.

Program code

#include <stdio.h>

#include <conio.h>

void main()

{

int a;

clrscr();

printf("Please input a number to find whether it is odd or even.\n");

scanf("%d",&a);

if ((a%2)==0)

printf("%d is even.\n",a);

else

printf("%d is odd.\n",a);

getch();

}

Example of output

Please input a number to find whether it is odd or even.

700

700 is even.

C program to display the following pattern.

* *

* * *

* * * *

* * * * *

* * * * * *

* * * * * * *

Program code

#include <stdio.h>

#include <conio.h>

void main()

{

int inner, outer, rows=1;

clrscr();

printf(“How many rows do you want to see? \n”);

scanf(“%d”, &rows);

printf(“The pattern is displayed below.\n”);

for (outer=1;outer<=rows;outer++)

{

for (inner=1;inner<=outer;inner++)

printf(“*\t”);

printf(“\n\n”);

}

getch();

}

Example of output

How many rows do you want to see?

The pattern is displayed below.

* *

* * *

* * * *

* * * * *

* * * * * *

* * * * * * *

C program to display the following pattern of numbers.

1 2

1 2 3

1 2 3 4

1 2 3 4 5

1 2 3 4 5 6

1 2 3 4 5 6 7

Program code

#include <stdio.h>

#include <conio.h>

void main()

{

int inner, outer, rows=1;

clrscr();

printf(“How many rows do you want to see? \n”);

scanf(“%d”, &rows);

printf(“The pattern is displayed below.\n”);

for (outer=1;outer<=rows;outer++)

{

for (inner=1;inner<=outer;inner++)

printf(“%d\t”,inner);

printf(“\n\n”);

}

getch();

}

Example of output

How many rows do you want to see?

The pattern is displayed below.

1 2

1 2 3

1 2 3 4

1 2 3 4 5

1 2 3 4 5 6

1 2 3 4 5 6 7

C program to find the greatest among three numbers.

Program code

#include <stdio.h>

#include <conio.h>

void main()

{

int a,b,c;

clrscr();

printf("Please input three numbers to find the greatest among them.\n");

scanf("%d%d%d",&a,&b,&c);

if ((a>b)&&(a>c))

printf("%d is the greatest among the given numbers.\n",a);

else if ((b>a)&&(b>c))

printf("%d is the greatest among the given numbers.\n",b);

else if ((c>a)&&(c>b))

printf("%d is the greatest among the given numbers.\n",c);

else

printf("All numbers are equal.\n");

getch();

}

Example of Output

Please input three numbers to find the greatest among them.

777

777 is the the greatest among the given numbers.