Question

•The multiplication operator works by summing some value, x, by another value, y. Write a function definition called multiply that takes two integer parameters to perform the operation described. Return the answer to the calling function.

•Write a function called randCount with no parameters. The function should randomly generate 5 numbers between 8 to 15 and counts how many times a multiple of 2 occurred. Return the answer to the calling function.

•Write a function called summary that takes as its parameters an input and output file. The function should read two integers find the sum of even numbers, the sum of odd numbers, and the cumulative product between two values lower and upper. The function should return the sum of even, odd, ad cumulative product between the lower and upper values.

•Write a function called countConsonants that takes an input file as its parameter. The function should read a word from a file, and a special character. It should count how many vowels and how special characters are in that string. The function should return the vowel and special character count to the calling function.

C++ program

Answer 1

Ans1 : multiplication function

#include <iostream>
using namespace std;

int multiply(int a, int b)
{
    int mul = 0;
    for(int i=0;i<b;i++)
    {
        mul += a;
    }
    return mul;
}

int main()
{
    cout<<multiply(3,4);
    return 0;
}

Output:

12

Ans 2: random function

#include <iostream>
using namespace std;

int randCount()
{
    int num, count = 0;
    for(int i=0;i<5;i++)
    {
        num = (rand() % (15 - 8 + 1) + 8);
        if(num % 2 == 0)
        {
            count++;
        }
    }
    return count;
}

int main()
{
    cout<<randCount();
    return 0;
}

Output:

T

Ans 3:

#include <iostream>
#include <stdlib.h>
using namespace std;

//Function for getting the product
int getProduct(int n) 
{ 
    int product = 1; 
  
    while (n != 0) { 
        product = product * (n % 10); 
        n = n / 10; 
    } 
  
    return product; 
} 
  
// Function to find the product of digits from L to R
int productinRange(int l, int r) 
{ 
    if (r - l > 9) 
        return 0; 
  
    else { 
        int p = 1; 
  
        // Iterate between L to R 
        for (int i = l; i <= r; i++) 
  
            p *= getProduct(i); 
  
        return p; 
    } 
} 

//Summary Function taking file arguments
int Summary(FILE *input, FILE *output)
{
    int sum_even = 0,sum_odd = 0, cumu = 1;
    int a, b;
    fscanf(input, "%d", &a);
    fscanf(input, "%d", &b);
    fclose (input);
    for(int i=a; i<=b; i++)
    {
        if(i%2==0)
        {
            sum_even += i;
        }
        else
        {
            sum_odd += i;
        }
    }
    cumu = productinRange(a, b); 
    if(output == NULL)
    {
        // File not created hence exit
        printf("Unable to create file.\n");
        exit(EXIT_FAILURE);
    }

    fprintf (output, "Sum of even: %d\n",sum_even);
    fprintf (output, "Sum of odd:  %d\n",sum_odd);
    fprintf (output, "Cumulative product:  %d\n",cumu);
    fclose (output);
}


int main()
{
    FILE *myFile;
    FILE * fp;
    
    myFile = fopen("input.txt", "r");
    fp = fopen ("output.txt","w");
    Summary(myFile, fp);
    return 0;
}

Input file:

input.txt I output.txt 20. ain.cpp 1 11 15

Output file:

pp input.txt output.txt Sum of even: 26 Sum of odd: 39 Cumulative product: 120

Ans 4:

#include <iostream>
#include <stdlib.h>
using namespace std;


//countConsonants Function taking file arguments
int countConsonants(FILE *input)
{
    char line[1000];
    fgets(line, 1000, input);
    int vowels = 0, specialChar = 0;
    
    for (int i = 0; line[i] != '\0'; ++i) {
        if (line[i] == 'a' || line[i] == 'e' || line[i] == 'i' ||
            line[i] == 'o' || line[i] == 'u' || line[i] == 'A' ||
            line[i] == 'E' || line[i] == 'I' || line[i] == 'O' ||
            line[i] == 'U') {
            ++vowels;
        } else if ((line[i] >= 'a' && line[i] <= 'z') || (line[i] >= 'A' && line[i] <= 'Z')) {
            continue;
        } else if (line[i] >= '0' && line[i] <= '9') {
            continue;
        } else{
            ++specialChar;
        }
    }
    cout<<"Text : "<<line;      
    cout<<"\nSpecial Character : "<<specialChar;
    cout<<"\nVowels : "<<vowels;
    fclose (input);
 }


int main()
{
    FILE *myFile;
    myFile = fopen("input.txt", "r");
    countConsonants(myFile);
    return 0;
}

Input file:

... cpp input.txt Hello; ;###AE

Output:

Text : Hello;; ###AE Special Character : 5 Vowels : 4

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