# 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;
ld=ld+a[r][r];
rd=rd+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("Left Diagonal Sum = %d\n",ld);
printf("Right Diagonal Sum = %d",rd);
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
Left Diagonal Sum = 97
Right Diagonal Sum = 125```