C++ program Input list of candidates and find winner of the Election based on received votes

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mahmoud2506

2022-05-05

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Construction of object for the problem...

For this very problem, we need to create a new object, candidate, which has members:

Last name
No of votes received

Thus define a class like following:

class candidate{
	//public member since we are not 
	//bothered about security of members
	public: 
		string name;
		int vote;
};

Thus now a new type of object variable we will create that is candidate & the algorithm is based on the class definition.

Algorithm:

Create an array of 5 element of type candidate.
Input all the entry & assign them to the candidate array.

Like for s be the input name & v be the no of 
received vote for ith candidate, we assign it by-
Array[i].name=s; //members are assigned their values
Array[i].vote=v;

To count the total number of votes, sum all the votes received.

For i=0:4
total_vote+= array[i].vote
End for loop

To calculate percentage vote received for each of the candidates, divide no of votes received by total_vote& make percentage. (Take care of integer division, result may reflect 0, if you change the order, first multiply with 100 or use floating calculation).
For figure out the winner

Set max= INT_MIN, count=0;
for i=0:4
Find the max vote received by any candidate in the election
End for loop

For i=0:4
if no of received vote for i th candidate==max
Store i
Increase count // no of winner candidate

Print the name(s) of winner(s) using the stored indexes.

C++ implementation

#include <bits/stdc++.h>
using namespace std;

class candidate{
	public:
		string name;
		int vote;
};

void outputElection(candidate* arr){
	int total_vote=0;
	for(int i=0;i<5;i++){
		//finding total no of votes
		total_vote=total_vote+arr[i].vote; 
	}

	cout<<"result of the election............."<<endl;
	cout<<"name of candidate"<<"\t"<<"vote received"<<"\t"<<"percentage"<<endl;
	for(int i=0;i<5;i++){
		cout<<arr[i].name<<"\t\t\t";
		cout<<arr[i].vote<<"\t\t";
		cout<<(arr[i].vote*100)/total_vote<<"%"<<endl;
	}

	int max=INT_MIN,count=0;
	int index[5]={0};

	for(int i=0;i<5;i++){
		if(arr[i].vote>max){
			max=arr[i].vote;
		}
	}
	
	for(int i=0;i<5;i++){
		if(arr[i].vote==max){
			index[count]=i;
			count++;
		}
	}
	
	if(count==1)
		cout<<"The winner is "<<arr[index[count-1]].name<<endl;
	else{
		cout<<"There is tie between:"<<endl;
		for(int i=0;i<count-1;i++)
			cout<<arr[index[i]].name<<", ";
		cout<<arr[index[count-1]].name<<endl;
		cout<<"all are winner\n";
	}
	return ;
}

int main(){
	string s;
	int v;
	candidate arr[5];
	cout<<"enter candidates last name, there are five candidates\n";
	for(int i=0;i<5;i++){
		cout<<"enter candidate "<<i<<" last name\n";
		cin>>s;
		arr[i].name=s;
		cout<<"enter no of votes received by candidate "<<i<<endl;
		cin>>v;
		arr[i].vote=v;
	}
	outputElection(arr);
	return 0;
}

Output (first run):

enter candidates last name, there are five candidates
enter candidate 0 last name
Peter
enter no of votes received by candidate 0
30
enter candidate 1 last name
Roy
enter no of votes received by candidate 1
20
enter candidate 2 last name
Ali
enter no of votes received by candidate 2
40
enter candidate 3 last name
Hales
enter no of votes received by candidate 3
60
enter candidate 4 last name
john
enter no of votes received by candidate 4
10
result of the election.............
name of candidate       vote received   percentage
Peter                   30              18%
Roy                     20              12%
Ali                     40              25%
Hales                   60              37%
john                    10              6%
The winner is Hales

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C++ program Input list of candidates and find winner of the Election based on received votes

C++ program Input list of candidates and find winner of the Election based on received votes

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