Hi I want to print the largest number of each column in a matrix How do I do that?

Answer 1

I do not know that

Answer 2

int test[3][4];
int main()
{

for(int i=0;i<3;i++)
{
for(int j=0;j<4;j++)
{
cin>>test[i][j];
}
}
I can only define it I do not know how to recognize the largest number

Answer 3

I could not make the columns

Answer 4

https://code.sololearn.com/ckZSmx0wR9i5/?ref=app

Answer 5

I can not write the code to recognize the largest number in the column

Answer 6

learner no, they are filling it using user input ie cin >> test[i][j]

Answer 7

You can think of an array to be a matrix where
test[n] ~ 1 x n matrix

test[i][j] ~ i x j matrix

Answer 8

First you gotta fill the array which is why they have 2 for loops

Next they should write an algorithm to find the biggest/smallest value in each column

Answer 9

idk, try this: https://code.sololearn.com/c9dKc5wxEWRQ/?ref=app
I know, it looks like bad code, but...

Answer 10

Uh, bruh, i forgot that i should did: https://code.sololearn.com/c9mX4r1Xwl29/?ref=app
Just replaced some variables

Answer 11

Here is something that can be used as a starting point:

To find the max or min of an array, assign the value of the first element to a variable. Then iterate through the array and compare the variable with the element. if it is bigger (or smaller if you want min), reassign the value to the variable. In the end you will have the max (or min).

https://code.sololearn.com/c1BGLaX8CAKU/?ref=app

Answer 12

Bob_Li Wow!!! really nice😍😘

Answer 13

Vkd thanks

Answer 14

Bob_Li Thank you for your help

Answer 15

Hi sorry for the late response
Here is the code in java

It's a 3x3 array so initially we need a variable say max =0 which will give us our ans i.e the max element in column because we keep on comparing until and unless we get the largest value in a 2d matrix

Since we need to check in each column we write arr[j] [I] > max and in each column we output the largest value after the inner loop ends...

public class Main
{
public static void main(String[] args) {
int[][] arr = { { 1, 2, 3 }, { 4, 5, 6 }, {7, 8, 9 }};
int max = 0;

for(int i = 0; i < 3; i++)
{
for(int j = 0; j < 3; j++)
{
if(arr[j][i] > max)
max = arr[j][i];
}
System.out.println(max);
}
}
}

Answer 16

But here's one drawback if you want impeccable code you can initialize max = Integer.MIN_VALUE and in c++ you can use max = INT_MIN which initializes with a minimum value possible... Now why INT_MIN and not MAX because if you initialize INT_MAX then there will be no such element greater than max variable hope it helps

Answer 17

An example for finding max in a single array would be :

int arr[5] = {9,3,2,10,1};

int max = arr[0]; //for now

//compare max to other values
for (int i = 1; i< 5;i++ )
if( arr[i] > max ) max = arr[i];

// max would be 10
cout << max << end;

Similar idea for your problem except instead of going down a line

You need to go down each column

Answer 18

Share a link to your code

Answer 19

It compiles fine. What did you mean by not being able to make the columns ?

Answer 20

Step one write the code to print each column

If you input :

1 2 5 3
4 7 2 5
7 6 1 4

Output :

1 4 7
2 7 6
5 2 1
3 5 4