# C Programming code for Multiplication of 2D Matrix – KLETech

### Write a Modular C Programming Code for Multiplication of a 2D Matrix?

CODE:

```#include<stdio.h>
#include<math.h>
#define ROW 10
#define COLUMN 10
void displayMatrix(int [ROW][COLUMN],int ,int);
void matrixmultiplication(int a[ROW][COLUMN],int R1,int C1,int[ROW][COLUMN],int R2, int C2, int res[ROW][COLUMN]);
int main()
{
int a[ROW][COLUMN];
int b[ROW][COLUMN];
int res[ROW][COLUMN]={0};
int R1,C1,R2,C2;
printf("Enter order of 1st matrix:\n");
scanf("%d%d",&R1,&C1);
printf("Enter order of 2nd matrix:\n");
scanf("%d%d",&R2,&C2);
if(C1!=R2)
{
printf("Matrix multiplication not possible\n");
exit(0);
}
printf("Enter elements of 1st Matrix:\n");
printf("Enter elements of 2nd matrix:\n");
matrixmultiplication(a,R1,C1,b,R2,C2,res);
printf("Matrix Array after multiplication:\n");
displayMatrix(res,R1,C2);
return 0;
}
{
int i,j;
for(i=0;i<r;i++)
{
for(j=0;j<c;j++)
scanf("%d",&a[i][j]);
}
}
void displayMatrix(int a[ROW][COLUMN],int r,int c)
{
int i,j;
for(i=0;i<r;i++)
{
for(j=0;j<c;j++)
{
printf("%d\t",a[i][j]);
}
printf("\n");
}
}
void matrixmultiplication(int a[ROW][COLUMN],int R1,int C1,int b[ROW][COLUMN],int R2, int C2, int res[ROW][COLUMN])
{
int i,j,k;
for(i=0;i<R1;i++)
{
for(j=0;j<C2;j++)
{
for(k=0;k<C1;k++)
{
res[i][j]=res[i][j]+a[i][k]*b[k][j];
}
}
}
}
```

OUTPUT

```Enter order of 1st matrix:
3 3
Enter order of 2nd matrix:
3 3
Enter elements of 1st Matrix:
3
6
5
2
4
6
8
1
9
Enter elements of 2nd matrix:
2
3
5
4
6
2
7
9
1
Matrix Array after multiplication:
65 90 32
62 84 24
83 111 51

Process returned 0 (0x0) execution time : 23.400 s
Press any key to continue.```

Please find some more codes of 1D Arrays, 2D Arrays, Pointers on the below page:

Top 100+ C Programming codes – KLE Technological University