CPP

c++ find largest number in array

#include <iostream>

int largestNumber(int nVariables, int numbers[]) //pass number of variables and number array
{
    int largest = numbers[0]; //initiate largest as the number at index 0
    
    for (int i = 0; i <= nVariables; i++) { //for loop to iterate through the numbers array that is nVariables long
        largest = (largest<numbers[i]?numbers[i]:largest);
      	//^ternary operator same as:
      	/*
        	if(largest < numbers[i]){
            	largest = numbers[i]; //sets largest as numbers[current iteration of i]
            }
            else{
            	largest = largest; // stays same
            }
        */
    }
    
    return largest;
}

int main()
{
    int nOfVariables;
    std::cout << "Input number of variables: ";
    std::cin >> nOfVariables;
    
    int variables[nOfVariables - 1];
    
    for (int i = 0; i < nOfVariables; i++) {
        std::cout << "Enter Variable #" << i + 1 << ": ";
        std::cin >> variables[i];
    }
    std::cout << std::endl;
    
    std::cout << std::endl << largestNumber(nOfVariables, variables) << std::endl;
}

find largest number in each row in array c++ using function

#include<iostream>
using namespace std;
void ro(int matrix1[][4]);
int main()
{
	int matrix1[6][4] = {                           //Always First Periorty Row & Second Periorty Colums
						  {42, 32, 42, 52 },       //Initilize 2D Array 6 Rows & 4 Colums 
						  {43, 34, 23, 53 },
						  {23, 54, 24,  3 },
						  {3,  5,  6,  55 },
						  {34, 6, 45,  56 },
						  {45, 56, 56, 57 }
                       	};
	ro(matrix1);

	return 0;
}
void ro(int matrix1[][4])
{

	for (int MainRowIndex = 0; MainRowIndex < 6; MainRowIndex++)                    // Main loop which decided which number of row check
	{
		int ColumnIndex = 0, MainRowIndexTeller = 0, ColoumsIndexTeller = 0;      // Decalaration && Inilization for Find Row & Colum Index in Every Main Row

		for (ColumnIndex = 0; ColumnIndex < 4; ColumnIndex++)
		{

			int max = matrix1[MainRowIndex][0];                              //Here We assign Every First element of row equal to Maximum Number 

			if (matrix1[MainRowIndex][ColumnIndex] > max)

			{

				matrix1[MainRowIndex][0] = matrix1[MainRowIndex][ColumnIndex];     //Here Condition When  first row Main Element is Less than Any other Element of this Specific row Than We assign the Maximum Element to first row Main Element. 

				MainRowIndexTeller = MainRowIndex;  ColoumsIndexTeller = ColumnIndex; //Here We Note the Running Index
			}

		}
		if (MainRowIndex == 0)
		{
			cout << "In Ist Row::  Maximum Value is " << matrix1[MainRowIndex][0] << "	Which Row&Colum No " << (1 + MainRowIndexTeller) << (1 + ColoumsIndexTeller) << "

";
		}

		if (MainRowIndex == 1)
		{
			cout << "In 2nd Row::  Maximum Value is " << matrix1[MainRowIndex][0] << "	Which Row&Colum No  " << (1 + MainRowIndexTeller) << (1 + ColoumsIndexTeller) << "

";
		}
		else if (MainRowIndex == 2)
		{
			cout << "In 3rd Row::  Maximum Value is " << matrix1[MainRowIndex][0] << "	Which Row&Colum No  " << (1 + MainRowIndexTeller) << (1 + ColoumsIndexTeller) << "

";
		}
		else if (MainRowIndex > 2)
		{
			cout << "In " << (1 + MainRowIndex) << "th Row::  Maximum Value is " << matrix1[MainRowIndex][0] << " 	Which Row & Colum No  " << (1 + MainRowIndexTeller) << (1 + ColoumsIndexTeller) << "

";
		}
	}
}