Hello guys need help on what wrong in my coding..

Question

#include<iostream>
using namespace std;

int main()
{
int m,n;
int a[size][size];
cout<<”enter the number of rows”<<endl;
cin>>m;
cout<<”enter the number of columns”<<endl;
cin>>n;

cout<<”enter the elements in table”<<endl;
for(int i = 0; i<m; i++)
{
for(int j = 0; j<n; j++)
{
cin>>a[i][j];
}
}
//output each array element’s value
for(int i = 0; i<m; i++)
for(int j = 0; j<n; j++)
{
cout<<”a[“<<i<<”][“<<j<<”]”;
cout>>a[i][j]<<endl;
}
return 0;
}

Answer 1

*ineteger array a is wrongly declared, declare it after taking m and n
Declare is as
int a[m][n];
*in sololearn playground, your double quotes are suspicious,
* while printing elements of the array,
use insertion operator << with cout.

Correct version is attached...
https://code.sololearn.com/cz2XAaxV4dEf/?ref=app

Answer 2

you are using the wrong quotes, use "" instead of ””.
a[size] [size] size is not defined, replace with m n a[m] [n]
last cout line
cout << not cout >>.

Answer 3

Just a friendly reminder that VLAs are illegal in C++

Maybe C++23 (with mdarrays) will finally give us a really nice way to do it

But until then... I guess you could use vector<vector<int>>

Answer 4

“ ” to " use half angle input method
int a[m][n]; array size
cout>>a[i][j]<<endl; cout<<

all in the error prompt

Input all data at once separated by Enter in the code playground

#include<iostream>
using namespace std;

int main()
{
int m,n;

cout<<"enter the number of rows"<<endl;
cin>>m;
cout<<"enter the number of columns"<<endl;
cin>>n;

int a[m][n];

cout<<"enter the elements in table"<<endl;
for(int i = 0; i<m; i++)
{
for(int j = 0; j<n; j++)
{
cin>>a[i][j];
}
}
//output each array element’s value
for(int i = 0; i<m; i++)
for(int j = 0; j<n; j++)
{
cout<<"a["<<i<<"]["<<j<<"]";
cout<<a[i][j]<<endl;
}
return 0;
}

Answer 5

Thanks for quickly response 😊