# Input numbers in 2d array and find the sum of each row, column, right and left diagonal in C

###### Two Dimensional Array - Question 7

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

**Q7)** Write a program in C to input numbers in a 3X3 integer matrix (2d array) and find the sum of each row, each column, right diagonal and left diagonal separately. Right Diagonal = \ and Left Diagonal = /.

#### Program

```
#include <stdio.h>
#include <conio.h>
int main()
{
int a[3][3], r,c,rs,cs,rd=0,ld=0;
printf("Enter 9 numbers\n");
for(r=0; r<3; r++)
{
for(c=0; c<3; c++)
{
scanf("%d",&a[r][c]);
}
}
for(r=0; r<3; r++)
{
rs=0;
cs=0;
rd=rd+a[r][r];
ld=ld+a[r][2-r];
for(c=0; c<3; c++)
{
printf("%d ",a[r][c]);
rs=rs+a[r][c]; // row sum
cs=cs+a[c][r]; // column sum
}
printf(" Row Sum = %d Column Sum = %d\n",rs,cs);
}
printf("Right Diagonal Sum = %d\n",rd);
printf("Left Diagonal Sum = %d",ld);
return 0;
}
```

#### Output

Enter 9 numbers 18 12 72 10 15 45 38 5 64 18 12 72 Row Sum = 102 Column Sum = 66 10 15 45 Row Sum = 70 Column Sum = 32 38 5 64 Row Sum = 107 Column Sum = 181 Right Diagonal Sum = 97 Left Diagonal Sum = 125