# Input numbers in 2d array and find sum of all numbers in C++

###### Two Dimensional Array - Question 1

In this question, we will see how to input numbers in a 3X3 integer matrix (2d array) and find the sum of all the numbers in C++ programming. To know more about two dimensional array click on the two dimensional array lesson.

**Q1)** Write a program in C++ to input numbers in a 3X3 integer matrix (2d array) and find the sum of all the numbers.

#### Program

```
#include <iostream>
#include <conio.h>
using namespace std;
int main()
{
int a[3][3], r,c,s=0;
cout<<"Enter 9 numbers\n";
for(r=0; r<3; r++)
{
for(c=0; c<3; c++)
{
cin>>a[r][c];
s=s+a[r][c];
}
}
cout<<"Sum of all the numbers = "<<s;
return 0;
}
```

#### Output

Enter 9 numbers 12 8 13 4 34 17 15 32 60 Sum of all the numbers = 195