Dear friends , Let’s continue to explore more C programs and their corresponding output.
C Programs 1 : Print following Floyd’s triangle
1
0 1
1 0 1
0 1 0 1
1 0 1 0 1
#include <stdio.h>
int main() {
int n, i, j, num = 1;
// Input the number of rows for the Floyd's triangle
printf("Enter the number of rows for Floyd's triangle: ");
scanf("%d", &n);
// Loop to iterate through each row
for (i = 1; i <= n; i++) {
// Loop to print each number in the row
for (j = 1; j <= i; j++) {
// Print 1 if the sum of row number and column number is even, else print 0
if ((i + j) % 2 == 0) {
printf("1 ");
} else {
printf("0 ");
}
}
printf("\n"); // Move to the next row
}
return 0;
}
Output:
Enter the number of rows for Floyd's triangle: 5
1
0 1
1 0 1
0 1 0 1
1 0 1 0 1 C Programs 2 : Print following Floyd’s triangle
1
2 3
4 5 6
7 8 9 10
11 12 13 14 15
#include <stdio.h>
int main() {
int n, num = 1;
// Input the number of rows for Floyd's triangle
printf("Enter the number of rows for Floyd's triangle: ");
scanf("%d", &n);
// Loop to iterate through each row
for (int i = 1; i <= n; i++) {
// Loop to print each number in the row
for (int j = 1; j <= i; j++) {
// Print the current number and increment it
printf("%d\t", num);
num++;
}
printf("\n"); // Move to the next row
}
return 0;
}
Output:
Enter the number of rows for Floyd's triangle: 5
1
2 3
4 5 6
7 8 9 10
11 12 13 14 15 C Programs 3 : Print following center aligned triangle
1
1 2 3
1 2 3 4 5
1 2 3 4 5 6 7
1 2 3 4 5 6 7 8 9
#include <stdio.h>
int main() {
int n = 5; // Number of rows in the triangle
int max_width = 2 * n - 1; // Maximum width of the triangle
for (int i = 1; i <= n; i++) {
int num = 1; // Initialize the first number for each row
int spaces = (max_width - 2 * i + 1) / 2; // Calculate the number of spaces to center-align the row
// Print leading spaces
for (int j = 0; j < spaces; j++) {
printf(" ");
}
// Print numbers for the current row
for (int j = 0; j < 2 * i - 1; j++) {
printf("%2d", num);
num++;
}
// Print trailing spaces and move to the next line
for (int j = 0; j < spaces; j++) {
printf(" ");
}
printf("\n");
}
return 0;
}
Output:
1
1 2 3
1 2 3 4 5
1 2 3 4 5 6 7
1 2 3 4 5 6 7 8 9C Programs 4 : Input text and count number of characters, words and lines
#include <stdio.h>
int main() {
char letter = 'a'; // Start with the letter 'a'
printf("Lowercase alphabets from 'a' to 'z':\n");
while (letter <= 'z') {
printf("%c ", letter); // Print the current letter
letter++; // Move to the next letter
}
printf("\n");
return 0;
}
Output:
Lowercase alphabets from 'a' to 'z':
a b c d e f g h i j k l m n o p q r s t u v w x y z C Programs 5 : Print alphabets in Upper case A B C D …Z
#include <stdio.h>
int main() {
char letter = 'A'; // Start with the letter 'A'
printf("Uppercase alphabets from 'A' to 'Z':\n");
while (letter <= 'Z') {
printf("%c ", letter); // Print the current letter
letter++; // Move to the next letter
}
printf("\n");
return 0;
}
Output:
Uppercase alphabets from 'A' to 'Z':
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z C Programs 6 : Print lowercase as well as uppercase alphabets in reverse order
Z Y X . . . C B A
z y x . . . c b a
#include <stdio.h>
int main() {
char lowercase = 'a'; // Starting with 'a'
char uppercase = 'A'; // Starting with 'A'
printf("Uppercase alphabets in reverse order:\n");
// Print uppercase alphabets in reverse order
for (int i = 25; i >= 0; i--) {
printf("%c ", uppercase + i); // Print the uppercase letter
}
printf("\n\nLowercase alphabets in reverse order:\n");
// Print lowercase alphabets in reverse order
for (int i = 25; i >= 0; i--) {
printf("%c ", lowercase + i); // Print the lowercase letter
}
printf("\n");
return 0;
}
Output:
Uppercase alphabets in reverse order:
Z Y X W V U T S R Q P O N M L K J I H G F E D C B A
Lowercase alphabets in reverse order:
z y x w v u t s r q p o n m l k j i h g f e d c b a C Programs 7 : Calculate power of a number
#include <stdio.h>
// Function to calculate the power
double power(double base, int exponent) {
double result = 1.0;
// For positive exponent
while (exponent > 0) {
result *= base;
exponent--;
}
// For negative exponent
while (exponent < 0) {
result /= base;
exponent++;
}
return result;
}
int main() {
double base;
int exponent;
printf("Enter the base number: ");
scanf("%lf", &base);
printf("Enter the exponent: ");
scanf("%d", &exponent);
double result = power(base, exponent);
printf("%.3lf raised to the power of %d is %.3lf\n", base, exponent, result);
return 0;
}
Output:
Enter the base number: 2
Enter the exponent: 5
2.000 raised to the power of 5 is 32.000C Programs 8 : Calculate sum of digits in a number
#include <stdio.h>
// Function to calculate the sum of digits
int sumOfDigits(int number) {
int sum = 0;
while (number > 0) {
int digit = number % 10; // Extract the last digit
sum += digit; // Add the digit to the sum
number /= 10; // Remove the last digit
}
return sum;
}
int main() {
int num;
printf("Enter a number: ");
scanf("%d", &num);
int result = sumOfDigits(num);
printf("Sum of digits in %d is %d\n", num, result);
return 0;
}
Output:
Enter a number: 12345
Sum of digits in 12345 is 15C Programs 9 : Input a number and calculate sum of product of its digits
#include <stdio.h>
// Function to calculate the sum of the product of digits
int sumOfProductOfDigits(int number) {
int sum = 0;
int product = 1;
while (number > 0) {
int digit = number % 10; // Extract the last digit
sum += digit; // Add the digit to the sum
product *= digit; // Multiply the digit to the product
number /= 10; // Remove the last digit
}
printf("Sum of digits = %d\n", sum);
printf("Product of digits = %d\n", product);
return sum;
}
int main() {
int num;
printf("Enter a number: ");
scanf("%d", &num);
int result = sumOfProductOfDigits(num);
return 0;
}
Output:
Enter a number: 12345
Sum of digits = 15
Product of digits = 120C Programs 10 : Print odd number in the range 1 … n. Also calculate their sum and average
#include <stdio.h>
int main() {
int n;
printf("Enter a positive integer (n): ");
scanf("%d", &n);
int sum = 0; // Initialize the sum to 0
int count = 0; // Initialize the count of odd numbers to 0
printf("Odd numbers in the range 1 to %d are: ", n);
for (int i = 1; i <= n; i++) {
if (i % 2 == 1) { // Check if the number is odd
printf("%d ", i);
sum += i; // Add the odd number to the sum
count++; // Increment the count of odd numbers
}
}
if (count > 0) {
double average = (double)sum / count; // Calculate the average
printf("\nSum of odd numbers: %d\n", sum);
printf("Average of odd numbers: %.2lf\n", average);
} else {
printf("\nNo odd numbers in the range.\n");
}
return 0;
}
Output:
Enter a positive integer (n): 10
Odd numbers in the range 1 to 10 are: 1 3 5 7 9
Sum of odd numbers: 25
Average of odd numbers: 5.00C Programs 11 : Print Chess Board
#include <stdio.h>
#include <conio.h>
int main() {
int r, c;
char chess[8][8];
clrscr();
for (r = 0; r < 8; r++) {
for (c = 0; c < 8; c++) {
if ((r + c) % 2 == 0)
chess[r][c] = 219; // ASCII code for a solid block character
else
chess[r][c] = 32; // ASCII code for a space character
printf("%c ", chess[r][c]);
}
printf("\n");
}
getch();
return 0;
}
Output:
█ █ █ █ █ █ █ █
█ █ █ █ █ █ █ █
█ █ █ █ █ █ █ █
█ █ █ █ █ █ █ █
█ █ █ █ █ █ █ █
█ █ █ █ █ █ █ █
█ █ █ █ █ █ █ █
█ █ █ █ █ █ █ █C Programs 12 : Input a 3 digit no. & check whether palindrome
Note: A palindrome is a number that can be read the same way both forwards and backwards. For example: 565
#include <stdio.h>
int main() {
int num, original, reverse = 0;
printf("Enter a 3-digit number: ");
scanf("%d", &num);
original = num; // Store the original number for comparison
// Check if the number is a 3-digit number
if (num >= 100 && num <= 999) {
while (num > 0) {
int digit = num % 10;
reverse = reverse * 10 + digit;
num = num / 10;
}
if (original == reverse) {
printf("%d is a palindrome.\n", original);
} else {
printf("%d is not a palindrome.\n", original);
}
} else {
printf("Input is not a 3-digit number.\n");
}
return 0;
}
Output:
Enter a 3-digit number: 121
121 is a palindrome.
Enter a 3-digit number: 123
123 is not a palindrome.
Enter a 3-digit number: 1234
Input is not a 3-digit number.