Programming for Problem Solving [ Lab Programs ]

Write a C program to find the sum of individual digits of a positive integer and test given numberis palindrome.

Algorithm


start
	step1: sum := 0
	step2: Read num
	step3: temp := num
	step4: while temp > 0 then
	step5: 	digit := temp % 10
	step6: 	sum := sum + digit
	step7: 	reversed := reversed * 10 + digit
	step8:  temp := temp/10
	step9: Print sum
	step10:if num = teversed then
	step11: Print "Num is a palindrome"
	step12:else Print "Num is not a palindrome"
stop

Flowchart

C Programming

//sum of individual digits of a positive integer and test given numberis palindrome.
#include <stdio.h>

int main() {
    int num,sum = 0,reversed,temp,digit;

    printf("Enter a number: ");
    scanf("%d", &num);
    temp = num;
    while (temp > 0) {
        digit=temp%10; 
        sum += digit;  // Add the last digit to sum
        reversed = reversed * 10 + digit;  // Build the reversed number
        temp /= 10;  // Remove the last digit
    }
    printf("Sum of individual digits: %d\n", sum);
    // Check if given number and reversed are the same
    if (num == reversed) { 
         printf("%d is a palindrome.\n", num);
    } else {
        printf("%d is not a palindrome.\n", num);
    }

    return 0;
}

OUTPUT

Enter a number: 12321
Sum of individual digits: 9
12321 is a palindrome.

C Programming Practice Problems

Simple Numeric Problems

1. Write a program for finding the max and min from the three numbers. View Solution

2. Write the program for the simple, compound interest. View Solution

3. Write a program that prints a multiplication table for a given number and the number of rows in the table. View Solution

4. Write a program that shows the binary equivalent of a given positive number between 0 to 255. View Solution

Expression Evaluation

1. Write a C program, which takes two integer operands and one operator from the user, performs the operation and then prints the result. (Consider the operators +,-,*, /, % and use Switch Statement). View Solution

2. Write a program that finds if a given number is a prime number. View Solution

3. Write a C program to find the sum of individual digits of a positive integer and test given number is palindrome. View Solution

4. A Fibonacci sequence is defined as follows: the first and second terms in the sequence are 0 and 1. Subsequent terms are found by adding the preceding two terms in the sequence. Write a C program to generate the first n terms of the sequence. View Solution

Arrays, Pointers and Functions

1. Write a C program to find the minimum, maximum and average in an array of integers. View Solution

2. Write a C program that uses functions to perform Addition of two matrices. View Solution

3. Write a C program that uses functions to perform Multiplication of two matrices. View Solution

4. Write a program for reading elements using a pointer into an array and display the values using the array. View Solution

5. Write a program for display values reverse order from an array using a pointer. View Solution

Files

1. Write a C program which copies one file to another, replacing all lowercase characters with their uppercase equivalents. View Solution

2. Write a C program to merge two files into a third file (i.e., the contents of the first file followed by those of the second are put in the third file). View Solution

Strings

1. Write a C program that uses functions to insert a sub-string into a given main string from a given position View Solution

2. Write a C program that uses functions to delete n Characters from a given position in a given string View Solution

3. Write a C program to determine if the given string is a palindrome or not (Spelled same in both directions with or without a meaning like madam, civic, noon, abcba, etc.) View Solution

4. Write a C program that displays the position of a character ch in the string S or – 1 if S doesn’t contain ch. View Solution

5. Write a C program to count the lines, words and characters in a given text. View Solution

Sorting and Searching

1. Write a C program that uses non-recursive function to search for a Key value in a given list of integers using linear search method. View Solution

2. Write a C program that uses non-recursive function to search for a Key value in a given sorted list of integers using binary search method. View Solution

3. Write a C program that implements the Bubble sort method to sort a given list of integers in ascending order. View Solution

4. Write a C program that sorts the given array of integers using selection sort in descending orde. View Solution

5. Write a C program that sorts the given array of integers using insertion sort in ascending order. View Solution

6. Write a C program that sorts a given array of names. View Solution

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