C program to multiply two matrices by passing matrix to a function

PROGRAM:

#include <stdio.h>

void enterData(int firstMatrix[][10], int secondMatrix[][10], int rowFirst, int columnFirst, int rowSecond, int columnSecond);
void multiplyMatrices(int firstMatrix[][10], int secondMatrix[][10], int multResult[][10], int rowFirst, int columnFirst, int rowSecond, int columnSecond);
void display(int mult[][10], int rowFirst, int columnSecond);

int main()
{
 int firstMatrix[10][10], secondMatrix[10][10], mult[10][10], rowFirst, columnFirst, rowSecond, columnSecond, i, j, k;

 printf("Enter rows and column for first matrix: ");
 scanf("%d %d", &rowFirst, &columnFirst);

 printf("Enter rows and column for second matrix: ");
 scanf("%d %d", &rowSecond, &columnSecond);

 
 while (columnFirst != rowSecond)
 {
  printf("Error! column of first matrix not equal to row of second.\n");
  printf("Enter rows and column for first matrix: ");
  scanf("%d%d", &rowFirst, &columnFirst);
  printf("Enter rows and column for second matrix: ");
  scanf("%d%d", &rowSecond, &columnSecond);
 }

 
        enterData(firstMatrix, secondMatrix, rowFirst, columnFirst, rowSecond, columnSecond);

        
        multiplyMatrices(firstMatrix, secondMatrix, mult, rowFirst, columnFirst, rowSecond, columnSecond);

       
        display(mult, rowFirst, columnSecond);

 return 0;
}

void enterData(int firstMatrix[][10], int secondMatrix[][10], int rowFirst, int columnFirst, int rowSecond, int columnSecond)
{
 int i, j;
 printf("\nEnter elements of matrix 1:\n");
 for(i = 0; i < rowFirst; ++i)
 {
  for(j = 0; j < columnFirst; ++j)
  {
   printf("Enter elements a%d%d: ", i + 1, j + 1);
   scanf("%d", &firstMatrix[i][j]);
  }
 }

 printf("\nEnter elements of matrix 2:\n");
 for(i = 0; i < rowSecond; ++i)
 {
  for(j = 0; j < columnSecond; ++j)
  {
   printf("Enter elements b%d%d: ", i + 1, j + 1);
   scanf("%d", &secondMatrix[i][j]);
  }
 }
}

void multiplyMatrices(int firstMatrix[][10], int secondMatrix[][10], int mult[][10], int rowFirst, int columnFirst, int rowSecond, int columnSecond)
{
 int i, j, k;

 
 for(i = 0; i < rowFirst; ++i)
 {
  for(j = 0; j < columnSecond; ++j)
  {
   mult[i][j] = 0;
  }
 }

 
 for(i = 0; i < rowFirst; ++i)
 {
  for(j = 0; j < columnSecond; ++j)
  {
   for(k=0; k<columnFirst; ++k)
   {
    mult[i][j] += firstMatrix[i][k] * secondMatrix[k][j];
   }
  }
 }
}

void display(int mult[][10], int rowFirst, int columnSecond)
{
 int i, j;
 printf("\nOutput Matrix:\n");
 for(i = 0; i < rowFirst; ++i)
 {
  for(j = 0; j < columnSecond; ++j)
  {
   printf("%d  ", mult[i][j]);
   if(j == columnSecond - 1)
    printf("\n\n");
  }
 }
}

OUTPUT:

Enter rows and column for first matrix: 3
2
Enter rows and column for second matrix: 3
2
Error! column of first matrix not equal to row of second.

Enter rows and column for first matrix: 2
3
Enter rows and column for second matrix: 3
2

Enter elements of matrix 1:
Enter elements a11: 3
Enter elements a12: -2
Enter elements a13: 5
Enter elements a21: 3
Enter elements a22: 0
Enter elements a23: 4

Enter elements of matrix 2:
Enter elements b11: 2
Enter elements b12: 3
Enter elements b21: -9
Enter elements b22: 0
Enter elements b31: 0
Enter elements b32: 4

Output Matrix:
24  29

6  25