 # Input numbers in 2d array and swap the largest with the smallest number in C++

###### Two Dimensional Array - Question 4

In this question, we will see how to input numbers in a 3X3 integer matrix (2d array) and interchange the largest with the smallest number from it in C++ programming. To know more about two dimensional array click on the two dimensional array lesson.

Q4) Write a program in C++ to input numbers in a 3X3 integer matrix (2d array) and interchange the largest with the smallest number from it.

#### Program

``````#include <iostream>
#include <conio.h>

using namespace std;

int main()
{
int a, r,c,lg=0,lr,lc,sm=0,sr,sc;

cout<<"Enter 9 numbers\n";
for(r=0; r<3; r++)
{
for(c=0; c<3; c++)
{
cin>>a[r][c];
if(r==0 && c==0)
{
lg=a[r][c];
lr=r;
lc=c;
sm=a[r][c];
sr=r;
sc=c;
}
else if(a[r][c]>lg)
{
lg=a[r][c];
lr=r;
lc=c;
}
else if(a[r][c]<sm)
{
sm=a[r][c];
sr=r;
sc=c;
}
}
}

a[lr][lc]=sm;
a[sr][sc]=lg;

cout<<"\nArray after interchanging largest with the smallest number\n";
for(r=0; r<3; r++)
{
for(c=0; c<3; c++)
{
cout<<a[r][c]<<" ";
}
cout<<endl;
}
return 0;
}``````

#### Output

```Enter 9 numbers
5
12
18
2
17
23
45
96
62

Array after interchanging largest with the smallest number
5 12 18
96 17 23
45 2 62``` 