Program to multiply two matrices / 2D arrays

Program
Time Complexity: O(r1 * c1 * c2)
Space Compexity: 0(1)
where r1 and c1 are the number of rows and columns in matrix A, and r2 and c2 are the number of rows and columns in matrix B

#include <stdio.h>
int main()
{
    printf("****************************************************");
    printf("\n****************************************************");
    printf("\n**    WAP to multiply two matrices or 2D arrays   **");
    printf("\n**            Created by Sheetal Garg             **");
    printf("\n**            Assistant Professor                 **");
    printf("\n**            Phone No:9467863365                 **");
    printf("\n****************************************************");
    printf("\n****************************************************\n");
    int r1, c1, r2, c2, i, j, k, a[5][5], b[5][5], c[5][5], p = 1;
    printf("Enter no. of rows and columns of first matrix\n");

    scanf("%d%d", &r1, &c1);
    printf("Enter no. of rows and columns of second matrix\n");
    scanf("%d%d", &r2, &c2);
    if (c1 == r2)
    {
        printf("enter elements of first matrix\n");
        for (i = 0; i < r1; i++)
            for (j = 0; j < c1; j++)
                scanf("%d", &a[i][j]);
        printf("enter elements of second matrix\n");
        for (i = 0; i < r2; i++)
            for (j = 0; j < c2; j++)
                scanf("%d", &b[i][j]);
        for (i = 0; i < r1; i++)
            for (j = 0; j < c2; j++)
            {
                c[i][j] = 0;
                for (k = 0; k < c1; k++)
                    c[i][j] = c[i][j] + a[i][k] * b[k][j];
            }  
        printf("\nThe first matrix is\n");
        for (i = 0; i < r1; i++)
        {
            for (j = 0; j < c1; j++)
                printf("%d\t", a[i][j]);
            printf("\n");
        }
        printf("\nThe second matrix is\n");
        for (i = 0; i < r2; i++)
        {
            for (j = 0; j < c2; j++)
                printf("%d\t", b[i][j]);
            printf("\n");
        }
        printf("\nThe resultant matrix multiplication is\n");
        for (i = 0; i < r1; i++)
        {
            for (j = 0; j < c2; j++)
                printf("%d\t", c[i][j]);
            printf("\n");
        }
    }
    else
        printf("\nmatrices cant be multiplied");
    return 0;
}

Output 1

****************************************************
****************************************************
**    WAP to multiply two matrices or 2D arrays   **
**            Created by Sheetal Garg             **
**            Assistant Professor                 **
**            Phone No:9467863365                 **
****************************************************
****************************************************
Enter no. of rows and columns of first matrix
3
3
Enter no. of rows and columns of second matrix
3
2
enter elements of first matrix
2 3 1
2 1 3
2 2 1
enter elements of second matrix
1 2
1 3
3 2

The first matrix is
2       3       1
2       1       3
2       2       1

The second matrix is
1       2
1       3
3       2

The resultant matrix multiplication is
8       15
12      13
7       12

Output 2

****************************************************
****************************************************
**    WAP to multiply two matrices or 2D arrays   **
**            Created by Sheetal Garg             **
**            Assistant Professor                 **
**            Phone No:9467863365                 **
****************************************************
****************************************************
Enter no. of rows and columns of first matrix
2
3
Enter no. of rows and columns of second matrix
2
3

matrices cant be multiplied