Answer to Question #262705 in C++ for Kimchi

Question

Write functions that do the following:

Sum the elements of a ma (two-dimensional array) of any match.
Sum the elements on the even/odd rows of a matrix
Find the maximum/minimum value of a matrix.
Find the maximum value on the cth column of the matrix
Write a main program that uses these functions in two cases:
The input matrix is ​​static with the given elements
The input matrix is ​​dynamic with the number of rows, columns and element values ​​entered from the keyboard.

Answer 1

//Using Static Array
using namespace std;


/*
	Write functions that do the following:


	Sum the elements of a ma (two-dimensional array) of any match.
	Sum the elements on the even/odd rows of a matrix
	Find the maximum/minimum value of a matrix.
	Find the maximum value on the cth column of the matrix
	Write a main program that uses these functions in two cases:
	The input matrix is ??static with the given elements
	The input matrix is ??dynamic with the number of rows, columns and element values ??entered from the keyboard.
*/


int main()
{
	int arr[5][4] = 	{
						{1, 3, 5, 7},
						{3, 5, 0, 7},
						{0, 2, 9, 6},
						{1, 3, 5, 0},
						{2, 5, 4, 8}
					};
	int r, c,Sum,rows,cols,Min,Max,cth;
//	Sum the elements of a ma (two-dimensional array) of any match.
	rows = sizeof(arr) / sizeof(arr[0]); // returns rows
	cols = sizeof(arr[0]) / sizeof(int); // returns col	for(r=0;r<)
	cout<<"\nRows = "<<rows;
	cout<<"\nCols = "<<cols<<endl;
	
	for(r=0;r<rows;r++)
	{
		for(c=0;c<cols;c++) cout<<"\t"<<arr[r][c];
		cout<<endl;
	}
//	Sum the elements on the even/odd rows of a matrix
	for(r=0;r<rows;r++)
	{
		Sum=0;
		if(r%2==0)
		{
			for(c=0;c<cols;c++) Sum = Sum + arr[r][c];
			cout<<"\nSum of Even Row-"<<r<<" = "<<Sum;
		}
		Sum=0;
		if(r%2==1)
		{
			for(c=0;c<cols;c++) Sum = Sum + arr[r][c];
			cout<<"\nSum of Odd Row-"<<r<<" = "<<Sum;
		}
	}
//	Find the maximum/minimum value of a matrix.
	Min = arr[0][0];	Max = arr[0][0];
	for(r=0;r<rows;r++)
	{
		for(c=0;c<cols;c++) 
		{
			if(Min>=arr[r][c]) Min = arr[r][c];
			if(Max<=arr[r][c]) Max = arr[r][c];
		}
	}
	cout<<"\n\nMax. Value = "<<Max;
	cout<<"\n\nMin. Value = "<<Min;


//	Find the maximum value on the cth column of the matrix
	cth = 3;
	Min = arr[0][cth];	Max = arr[0][cth];
	for(r=0;r<rows;r++)
	{
		if(Min>=arr[r][cth]) Min = arr[r][cth];
		if(Max<=arr[r][cth]) Max = arr[r][cth];
	}
	cout<<"\n\nMin Value in "<<cth<<"th column = "<<Min;
	cout<<"\n\nMax Value in "<<cth<<"th column = "<<Max;
}




int main()
{
	int arr[5][4] = 	{
						{1, 3, 5, 7},
						{3, 5, 0, 7},
						{0, 2, 9, 6},
						{1, 3, 5, 0},
						{2, 5, 4, 8}
					};
	int r, c,Sum,rows,cols,Min,Max,cth;
//	Sum the elements of a ma (two-dimensional array) of any match.
	rows = sizeof(arr) / sizeof(arr[0]); // returns rows
	cols = sizeof(arr[0]) / sizeof(int); // returns col	for(r=0;r<)
	cout<<"\nRows = "<<rows;
	cout<<"\nCols = "<<cols<<endl;
	
	for(r=0;r<rows;r++)
	{
		for(c=0;c<cols;c++) cout<<"\t"<<arr[r][c];
		cout<<endl;
	}
//	Sum the elements on the even/odd rows of a matrix
	for(r=0;r<rows;r++)
	{
		Sum=0;
		if(r%2==0)
		{
			for(c=0;c<cols;c++) Sum = Sum + arr[r][c];
			cout<<"\nSum of Even Row-"<<r<<" = "<<Sum;
		}
		Sum=0;
		if(r%2==1)
		{
			for(c=0;c<cols;c++) Sum = Sum + arr[r][c];
			cout<<"\nSum of Odd Row-"<<r<<" = "<<Sum;
		}
	}
//	Find the maximum/minimum value of a matrix.
	Min = arr[0][0];	Max = arr[0][0];
	for(r=0;r<rows;r++)
	{
		for(c=0;c<cols;c++) 
		{
			if(Min>=arr[r][c]) Min = arr[r][c];
			if(Max<=arr[r][c]) Max = arr[r][c];
		}
	}
	cout<<"\n\nMax. Value = "<<Max;
	cout<<"\n\nMin. Value = "<<Min;


//	Find the maximum value on the cth column of the matrix
	cth = 3;
	Min = arr[0][cth];	Max = arr[0][cth];
	for(r=0;r<rows;r++)
	{
		if(Min>=arr[r][cth]) Min = arr[r][cth];
		if(Max<=arr[r][cth]) Max = arr[r][cth];
	}
	cout<<"\n\nMin Value in "<<cth<<"th column = "<<Min;
	cout<<"\n\nMax Value in "<<cth<<"th column = "<<Max;
}

//Using Dynamic Array

int main()
{
	int r, c,Sum,rows,cols,Min,Max,cth;
//	Sum the elements of a ma (two-dimensional array) of any match.
	cout<<"\nEnter no. of rows: "; cin>>rows;
	cout<<"\nEnter no. of cols: "; cin>>cols;
	
	int arr[rows][cols];
		
	for(r=0;r<rows;r++)	
	{
		for(c=0;c<cols;c++)
		{
			cout<<"Enter element Array["<<r<<"]["<<c<<"] = "; cin>>arr[r][c];
		}
	}
	for(r=0;r<rows;r++)
	{
		for(c=0;c<cols;c++) cout<<"\t"<<arr[r][c];
		cout<<endl;
	}
//	Sum the elements on the even/odd rows of a matrix
	for(r=0;r<rows;r++)
	{
		Sum=0;
		if(r%2==0)
		{
			for(c=0;c<cols;c++) Sum = Sum + arr[r][c];
			cout<<"\nSum of Even Row-"<<r<<" = "<<Sum;
		}
		Sum=0;
		if(r%2==1)
		{
			for(c=0;c<cols;c++) Sum = Sum + arr[r][c];
			cout<<"\nSum of Odd Row-"<<r<<" = "<<Sum;
		}
	}
//	Find the maximum/minimum value of a matrix.
	Min = arr[0][0];	Max = arr[0][0];
	for(r=0;r<rows;r++)
	{
		for(c=0;c<cols;c++) 
		{
			if(Min>=arr[r][c]) Min = arr[r][c];
			if(Max<=arr[r][c]) Max = arr[r][c];
		}
	}
	cout<<"\n\nMax. Value = "<<Max;
	cout<<"\n\nMin. Value = "<<Min;


//	Find the maximum value on the cth column of the matrix
	cth=cols+1;
	while(cth<0 || cth>cols-1)
	{
		cout<<"\n\nEnter cth column: (0 to "<<cols-1<<")"; cin>>cth;
	}
	Min = arr[0][cth];	Max = arr[0][cth];
	for(r=0;r<rows;r++)
	{
		if(Min>=arr[r][cth]) Min = arr[r][cth];
		if(Max<=arr[r][cth]) Max = arr[r][cth];
	}
	cout<<"\n\nMin Value in "<<cth<<"th column = "<<Min;
	cout<<"\n\nMax Value in "<<cth<<"th column = "<<Max;
}