Data Structure and Algorithm

menguin

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1. This is a C++ Program to emulate N-dice roller. This can be done by generating random number between 1-6.
Here is source code of the C++ Program to Emulate N Dice Roller. The C++ program is successfully compiled and run on a Linux system. The program output is also shown below.
Code:
#include <iostream>
#include <stdlib.h>
 
using namespace std;
 
 int main(int argc, char **argv)
 {
     cout << "Enter the number of dice: ";
     int n;
    cin >> n;
    cout << "The values on dice are: ( ";
    for (int i = 0; i < n; i++)
        cout << (rand() % 6) + 1<<" ";
    cout<<")";
}



2. C Program to Calculate Sum & Average of an Array
This C Program calculates the sum & average of an array. It declares an array and then add the array elements and finds the average of the array.

Here is source code of the C program to calculate the sum & average of an array. The C program is successfully compiled and run on a Linux system. The program output is also shown below.
Code:
  /*
   * C program to read N integers into an array A and
   * a) Find the sum of negative numbers
   * b) Find the sum of positive numbers
   * c) Find the average of all numbers
   * Display the results with suitable headings
   */
  #include  <stdio.h>
  #define MAXSIZE 10
 
void main()
{
   int array[MAXSIZE];
   int i, num, negative_sum = 0, positive_sum = 0;
   float total = 0.0, average;
 
    printf ("Enter the value of N \n");
    scanf("%d", &num);
    printf("Enter %d numbers (-ve, +ve and zero) \n", num);
    for (i = 0; i < num; i++)
    {
        scanf("%d", &array[i]);
    }
    printf("Input array elements \n");
    for (i = 0; i < num; i++)
    {
        printf("%+3d\n", array[i]);
    }
    /*  Summation starts */
    for (i = 0; i < num; i++)
    {
        if (array[i] < 0)
        {
            negative_sum = negative_sum + array[i];
        }
        else if (array[i] > 0)
        {
            positive_sum = positive_sum + array[i];
        }
        else if (array[i] == 0)
        {
            ;
        }
        total = total + array[i] ;
    }
    average = total / num;
    printf("\n Sum of all negative numbers =  %d\n", negative_sum);
    printf("Sum of all positive numbers =  %d\n", positive_sum);
    printf("\n Average of all input numbers =  %.2f\n", average);
}


3. C Program to Check if a given String is Palindrome
This C Program checks if a given string is palindrome. This program first performs reverse of a string. Then it checks whether the given string is equivalent to the reversed string. If they are equal then the string is called as palindrome.

Here is source code of the C program to check a given string is palindrome. The C program is successfully compiled and run on a Linux system. The program output is also shown below.

Code:
  /*
   * C program to read a string and check if it's a palindrome, without
   * using library functions. Display the result.
   */
  #include <stdio.h>
  #include <string.h>
 
  void main()
  {
    char string[25], reverse_string[25] = {'\0'};
    int  i, length = 0, flag = 0;
 
    fflush(stdin);
    printf("Enter a string \n");
    gets(string);
    /*  keep going through each character of the string till its end */
    for (i = 0; string[i] != '\0'; i++)
    {
        length++;
    }
    for (i = length - 1; i >= 0; i--)
   {
      reverse_string[length - i - 1] = string[i];
    }
    /*
    * Compare the input string and its reverse. If both are equal
   * then the input string is palindrome.
    */
   for (i = 0; i < length; i++)
   {
       if (reverse_string[i] == string[i])
            flag = 1;
        else
            flag = 0;
    }
   if (flag == 1)
        printf("%s is a palindrome \n", string);
   else
        printf("%s is not a palindrome \n", string);
}
 

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