C program to print given numbers as a pyramid

Write a C program to print given numbers as a pyramid.
In this program we use the simple for statements to produce the patterns.
This program prints the following output,
        1
      232
    34543
  4567654
567898765
 Read more about C Programming Language . and read the C Programming Language (2nd Edition). by K and R.

–>

/***********************************************************
* You can use all the programs on www.c-program-example.com
* for personal and learning purposes. For permissions to use the
* programs for commercial purposes,
* contact info@c-program-example.com
* To find more C programs, do visit www.c-program-example.com
* and browse!
*
* Happy Coding
***********************************************************/

#include<stdio.h>


void display(int start, char *str){

int i,j;


for(i=start; i<=(start+start); i++)

printf("%c",str[i]);

for(j=i-2;j>=start;j--)

printf("%c",str[j]);

}


main(){

char str[]="123456789";

int i, j;

for(i=0;i<5;i++){

display(i, str);

printf("n");

}

}
Read more Similar C Programs
 
Graphics in C

C Strings 
 
C Aptitude 
 

You can easily select the code by double clicking on the code area above.

To get regular updates on new C programs, you can Follow @c_program

You can discuss these programs on our Facebook Page. Start a discussion right now,

our page!

Share this program with your Facebook friends now! by liking it

(you can send this program to your friend using this button)

Like to get updates right inside your feed reader? Grab our feed!

–> To browse more C Programs visit this link
(c) www.c-program-example.com

C program to convert a Binary number into its equivalent Decimal, Octal and Hexadecimal numbers.

C Program to convert binary number into its equivalent Decimal, Octal, and Hexadecimal representations. In this program we convert a binary number to decimal. Then convert that decimal number to octal and Hexadecimal equivalent.

The program implements various functions to do the job.

  • binary_to_decimal : Convert given binary number to it’s decimal equivalent
  • decimal_to_octal : Convert from decimal to octal
  • decimal_to_hex : Convert from decimal to hexadecimal

The main function takes care of getting input from user, calling the above functions and displaying the results.

Read more here: What are binary, octal, and hexadecimal notation?

The Program

#include <stdio.h>
/*
* Function to convert a given decimal number to its
* hexadecimal equivalent.
*/
int decimal_to_hex(long number, char *hexstr, int pos) {
long i;
int new_position, n;
char hexchar;
new_position = pos;
if(number > 0) {
i = number % 16;
n = number / 16;
new_position = decimal_to_hex(n, hexstr, pos);
if(i >= 10) {
switch(i) {
case 10: hexchar = 'A'; break;
case 11: hexchar = 'B'; break;
case 12: hexchar = 'C'; break;
case 13: hexchar = 'D'; break;
case 14: hexchar = 'E'; break;
case 15: hexchar = 'F'; break;
}
} else {
hexchar = '0' + i;
}
hexstr[new_position++] = hexchar;
hexstr[new_position] = '\0';
}
return new_position;
}
/*
* Function to convert a given binary number to
* its decimal equivalent.
*/
int binary_to_decimal(int num) {
int rem, base = 1, decimal_number = 0;
while( num > 0) {
rem = num % 10;
if((rem == 0) || (rem == 1)) {
decimal_number = decimal_number + rem * base;
num = num / 10 ;
base = base * 2;
} else {
return -1; // Invalid binary number
}
}
return decimal_number;
}
/*
* Function to convert a given decimal number in to
* its octal equivalent.
*/
int decimal_to_octal(int number) {
int octal_number = 0, rem, base = 1;
while(number > 0) {
rem = number % 8;
octal_number = octal_number + rem * base;
base = base * 10;
number = number / 8;
}
return octal_number;
}
void main() {
int binary_numer, decimal_number, octal_number;
char hexstr[25] = "0";
printf("Enter a binary number: ");
scanf("%d", &binary_numer);
printf("Given Binary number is: %d\n", binary_numer);
decimal_number = binary_to_decimal(binary_numer);
if(decimal_number == -1) {
printf("\nInvalid binary number. Try again.");
return;
}
printf("Its Decimal equivalent is: %d", decimal_number);
octal_number = decimal_to_octal(decimal_number);
printf("\nIts octal equivalent is: %d", octal_number);
decimal_to_hex(decimal_number, hexstr, 0);
printf("\nIts Hexa Decimal equivalent is: %s", hexstr);
}

Sample Output

Binary to decimal, binary to octal, binary to hexadecimal

Related Programs

You can discuss these programs on our Facebook Page. Like to get updates right inside your feed reader? Grab our feed!

Edit1 : 11th August 2017

  • Added screenshot of sample runs
  • Moved the code to it’s own Gist
  • Modified the program to make it more modular

(c) www.c-program-example.com

C Program to check the given number is Armstrong or not?

C Program to check the given number is Armstrong number or not?. Armstrong number is a number that is the sum of its own digits each raised to the power of the number of digits. Example: 153 = 1^3 + 5^3 + 3^3. Read more about C Programming Language .

/***********************************************************
* You can use all the programs on www.c-program-example.com
* for personal and learning purposes. For permissions to use the
* programs for commercial purposes,
* contact info@c-program-example.com
* To find more C programs, do visit www.c-program-example.com
* and browse!
*
* Happy Coding
***********************************************************/


#include<stdio.h>
void main()
{
int num,num1,arms=0,rem;

printf("Enter the number:n");
scanf("%d",&num);
num1=num;
while(num>0)
{
rem=num%10;
arms=arms+rem*rem*rem;
num=num/10;
}
if(num1==arms)
{
printf(" n%d is an Armstrong number",num1);
}
else
{
printf("n%d is NOT an Armstrong number",num1);
}

}
Read more Similar C Programs
Learn C Programming

Number System

You can easily select the code by double clicking on the code area above.

To get regular updates on new C programs, you can Follow @c_program

You can discuss these programs on our Facebook Page. Start a discussion right now,

our page!

Share this program with your Facebook friends now! by liking it

(you can send this program to your friend using this button)

Like to get updates right inside your feed reader? Grab our feed!

(c) www.c-program-example.com

C Program to check the given number is perfect or not.

C Program to check the given number is perfect or not?.  Perfect number is a positive integer that is equal to the sum of its proper positive divisors. example 6, divisor of 6 are 1, 2,3. Sum of divisors is 1+2+3=6.
Read more about C Programming Language .

/***********************************************************
* You can use all the programs on www.c-program-example.com
* for personal and learning purposes. For permissions to use the
* programs for commercial purposes,
* contact info@c-program-example.com
* To find more C programs, do visit www.c-program-example.com
* and browse!
*
* Happy Coding
***********************************************************/


#include<stdio.h>
int main(){
int num,i=1,sum=0;

printf("Enter a number: ");
scanf("%d",&num);

while(i<num){
if(num%i==0)
sum=sum+i;
i++;
}
if(sum==num)
printf("%d is a perfect number",i);
else
printf("%d is not a perfect number",i);

return 0;
}
Read more Similar C Programs
Learn C Programming

Number System

You can easily select the code by double clicking on the code area above.

To get regular updates on new C programs, you can Follow @c_program

You can discuss these programs on our Facebook Page. Start a discussion right now,

our page!

Share this program with your Facebook friends now! by liking it

(you can send this program to your friend using this button)

Like to get updates right inside your feed reader? Grab our feed!

(c) www.c-program-example.com