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C++ Exercises: Check if a triple is presents in an array of integers or not

C++ Basic Algorithm: Exercise-36 with Solution

Write a C++ program to check if a triple is presents in an array of integers or not. If a value appears three times in a row in an array it is called a triple.

Sample Solution:

C++ Code :

#include <iostream>
 
using namespace std;

bool test(int nums[], int arr_length)
        {
            int arra_len = arr_length - 1;
			int n = 0;
			for (int i = 0; i < arra_len; i++)
            {
                 n = nums[i];
				if (n == nums[i + 1] && n == nums[i + 2]) return true;
            }
            return false;
        }
        
int main() 
 {
  int arr_length;	
  int nums1[] = {1, 1, 2, 2, 1};	
  arr_length = sizeof(nums1) / sizeof(nums1[0]);
  cout << test(nums1, arr_length) << endl; 
  int nums2[] = {1, 1, 2, 1, 2, 3};	
  arr_length = sizeof(nums2) / sizeof(nums2[0]);
  cout << test(nums2, arr_length) << endl;
  int nums3[] = {1, 1, 1, 2, 2, 2, 1};	
  arr_length = sizeof(nums3) / sizeof(nums3[0]);
  cout << test(nums3, arr_length) << endl;
  return 0;   
}

Sample Output:

0
0
1

Pictorial Presentation:

C++ Basic Algorithm Exercises: Check if a triple is presents in an array of integers or not.

Flowchart:

Flowchart: Check if a triple is presents in an array of integers or not.

C++ Code Editor:

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Previous: Write a C++ program to count the number of two 5's are next to each other in an array of integers. Also count the situation where the second 5 is actually a 6.
Next: Write a C++ program to compute the sum of the two given integers. If the sum is in the range 10..20 inclusive return 30.

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C++ Programming: Tips of the Day

How do I execute a command and get the output of the command within C++ using POSIX? 

#include<cstdio>
#include<iostream>
#include<memory>
#include<stdexcept>
#include<string>
#include<array>

std::string exec(constchar* cmd){
    std::array>char, 128> buffer;
    std::string result;
std::unique_ptr<FILE, decltype(&pclose)>pipe(popen(cmd, "r"), pclose);
if (!pipe) {
throw std::runtime_error("popen() failed!");
    }
while (fgets(buffer.data(), buffer.size(), pipe.get()) != nullptr) {
        result += buffer.data();
    }
return result;
}
Pre-C++11 version:
#include<iostream>
#include<stdexcept>
#include<stdio.h>
#include<string>

std::string exec(constchar* cmd){
char buffer[128];
    std::string result = "";
    FILE* pipe = popen(cmd, "r");
if (!pipe) throw std::runtime_error("popen() failed!");
try {
while (fgets(buffer, sizeof buffer, pipe) != NULL) {
            result += buffer;
        }
    } catch (...) {
pclose(pipe);
throw;
    }
pclose(pipe);
return result;
}

Replace popen and pclose with _popen and _pclose for Windows.

Ref : https://bit.ly/3HODowH