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C++ Program to Count Positive, Zero and Negative Numbers



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In this article, you will learn and get code on counting of positive, zero, and negative numbers in C++. The program is created in following ways:

Count Positive, Negative and Zero in C++

The program given below counts the occurrence (frequency) of positive, zero, and negative numbers from the given set of numbers entered by the user (at run-time) in C++ programming.

The question is, write a program in C++ that count and prints frequency of positive, zero, and negative numbers. The answer to this question is given below:

#include<iostream>
using namespace std;
int main()
{
    intpos=0, neg=0, zer=0, i, arr[10];
    cout<<"Enter 10 Numbers: ";
    for(i=0; i<10; i++)
        cin>>arr[i];
    for(i=0; i<10; i++)
    {
        if(arr[i]>0)
            pos++;
        else if(arr[i]==0)
            zer++;
        else
            neg++;
    }
    cout<<"\nFrequency of Positive Numbers: "<<pos;
    cout<<"\nFrequency of Zero: "<<zer;
    cout<<"\nFrequency of Negative Numbers: "<<neg;
    cout<<endl;
    return 0;
}

This program was build and run under Code::Blocks. Here is its sample run:

C++ program count positive negative zero

Now supply any 10 numbers say 1, 0, -3, 4, 5, 0, -8, 9, 6, 0 and press ENTER key to see the occurrence or frequency of positive, zero, and negative numbers as shown in the output given below:

count positive negative numbers c++

In above program, when user enters 10 numbers (for example: 1, 0, -3, 4, 5, 0, -8, 9, 6, 0), then all the 10 numbers gets initialized to arr[] in following way:

Now the dry run of above program with these 10 values goes like:

Allow User to Define the Size for Array

This program allows user to define the size for the array. That is, how many number, he/she wants to enter, and then find and print the occurrence of positive, zero, and negative numbers.

#include<iostream>
using namespace std;
int main()
{
    intpos=0, neg=0, zer=0, i, arr[100], tot;
    cout<<"Enter the Size (max. 100): ";
    cin>>tot;
    cout<<"Enter "<<tot<<" Numbers: ";
    for(i=0; i<tot; i++)
    {
        cin>>arr[i];
        if(arr[i]>0)
            pos++;
        else if(arr[i]==0)
            zer++;
        else
            neg++;
    }
    cout<<"\nFrequency of Positive Numbers: "<<pos;
    cout<<"\nFrequency of Zero: "<<zer;
    cout<<"\nFrequency of Negative Numbers: "<<neg;
    cout<<endl;
    return 0;
}

Below is its sample run with user input, 5 as size, and 1, -2, 3, 0, 4 as 5 numbers:

count positive and negative numbers in array c++

Note - At the time of receiving numbers, the above program counts positive, zero, and negative numbers. That is, above program does both the job of receiving and counting with only one for loop

Using while Loop

This program uses while loop to receive the input (list of numbers) and counts the occurrence of positive, zero, and negative numbers.

#include<iostream>
using namespace std;
int main()
{
    intpos=0, neg=0, zer=0, i=0, arr[100], tot;
    cout<<"Enter the Size (max. 100): ";
    cin>>tot;
    cout<<"Enter "<<tot<<" Numbers: ";
    while(i<tot)
    {
        cin>>arr[i];
        if(arr[i]>0)
            pos++;
        else if(arr[i]==0)
            zer++;
        else
            neg++;
        i++;
    }
    cout<<"\nFrequency of Positive Numbers: "<<pos;
    cout<<"\nFrequency of Zero: "<<zer;
    cout<<"\nFrequency of Negative Numbers: "<<neg;
    cout<<endl;
    return 0;
}

This program produces the same output as of previous program.

Same Program in Other Languages

C++ Online Test


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