Write a program in C for multiplication of two square Matrices.

#include 
void enterData(int first[][10], int second[][10], int r1, int c1, int r2, int c2);
void multiplyMatrices(int first[][10], int second[][10], int multResult[][10], int r1, int c1, int r2, int c2);
void display(int mult[][10], int r1, int c2);
int main() 
{
    int first[10][10], second[10][10], mult[10][10], r1, c1, r2, c2;
    printf("Enter rows and column for the first matrix: ");
    fflush(stdout);
    scanf("%d %d", &r1, &c1);
    printf("Enter rows and column for the second matrix: ");
      fflush(stdout);
    scanf("%d %d", &r2, &c2);
    // Taking input until columns of the first matrix is equal to the rows of the second matrix
    while (c1 != r2)
     {
        printf("Error! Enter rows and columns again.\n");
        printf("Enter rows and columns for the first matrix: ");
        ....

#include 
void enterData(int first[][10], int second[][10], int r1, int c1, int r2, int c2);
void multiplyMatrices(int first[][10], int second[][10], int multResult[][10], int r1, int c1, int r2, int c2);
void display(int mult[][10], int r1, int c2);
int main() 
{
    int first[10][10], second[10][10], mult[10][10], r1, c1, r2, c2;
    printf("Enter rows and column for the first matrix: ");
    fflush(stdout);
    scanf("%d %d", &r1, &c1);
    printf("Enter rows and column for the second matrix: ");
      fflush(stdout);
    scanf("%d %d", &r2, &c2);
    // Taking input until columns of the first matrix is equal to the rows of the second matrix
    while (c1 != r2)
     {
        printf("Error! Enter rows and columns again.\n");
        printf("Enter rows and columns for the first matrix: ");
          fflush(stdout);
        scanf("%d%d", &r1, &c1);
        printf("Enter rows and columns for the second matrix: ");
          fflush(stdout);
        scanf("%d%d", &r2, &c2);
    }
    // Function to take matrices data
    enterData(first, second, r1, c1, r2, c2);
    // Function to multiply two matrices.
    multiplyMatrices(first, second, mult, r1, c1, r2, c2);
    // Function to display resultant matrix after multiplication.
    display(mult, r1, c2);
    return 0;
}
void enterData(int first[][10], int second[][10], int r1, int c1, int r2, int c2) 
{
    printf("\nEnter elements of matrix 1:\n");
    for (int i = 0; i < r1; ++i)
     {
        for (int j = 0; j < c1; ++j)
         {
            printf("Enter a%d%d: ", i + 1, j + 1);
            scanf("%d", &first[i][j]);
        }
    }
    printf("\nEnter elements of matrix 2:\n");
    for (int i = 0; i < r2; ++i)
     {
        for (int j = 0; j < c2; ++j)
         {
            printf("Enter b%d%d: ", i + 1, j + 1);
            scanf("%d", &second[i][j]);
        }
    }
}
void multiplyMatrices(int first[][10], int second[][10], int mult[][10], int r1, int c1, int r2, int c2)
 {
    // Initializing elements of matrix mult to 0.
    for (int i = 0; i < r1; ++i) 
    {
        for (int j = 0; j < c2; ++j)
         {
            mult[i][j] = 0;
        }
    }
    // Multiplying first and second matrices and storing in mult.
    for (int i = 0; i < r1; ++i)
     {
        for (int j = 0; j < c2; ++j)
         {
            for (int k = 0; k < c1; ++k) 
            {
                mult[i][j] += first[i][k] * second[k][j];
            }
        }
    }
}
void display(int mult[][10], int r1, int c2)
 {
    printf("\nOutput Matrix:\n");
    for (int i = 0; i < r1; ++i) 
    {
        for (int j = 0; j < c2; ++j)
         {
            printf("%d  ", mult[i][j]);
            if (j == c2 - 1)
                printf("\n");
        }
    }
}