Sum of two matrix in C

Algorithm

Input: Input rows and column of the arrays, elements of the arrays
output: Displays the sum of element of the array

Start
Input the number of row and store it in m for both matrices
Input the number of column and store it in n for both matrices
Check if m1 = m2 and n1 = n2
4.1 Enter the elements of the array a [ m1 ] [ n1 ] and b [ n2 ] [ m2 ]
4.2 i = 0
while ( i < n )
4.2.1 j = 0
4.2.2 while ( j < m )
4.2.2.1 c [ i ] [ j ] = a[ i ] [ j ] + b [ i ] [ j ]
4.2.2.2 j++
4.2.3 i++
4.3 Print the array c [ i ] [ j ]
Else print "The addition of matrices is not possible, Since the rows or columns does not match"
Stop

C Program

# include <stdio.h>
int main()

{
//Enter the rows and columns and elements of the first and second array
int n1,m1,n2,m2;
printf("Enter the number of rows of the first matrix: ");
scanf("%d", &n1);
printf("Enter the number of column of the first matrix: ");
scanf("%d", &m1);
printf("Enter the number of rows of the second matrix: ");
scanf("%d", &n2);
printf("Enter the number of column of the second matrix: ");
scanf("%d", &m2);

if ( m1 == m2 && n1 == n2) {
int a[m1][n1], b[m2] [n2], c[m1] [n1];

printf("Enter the elements of the first array: \n");
for (int i =0; i < m1; i++){
for (int j = 0; j < n1; j++)
scanf("%d", &a[i][j]);
}

printf("Enter the elements of the second array: \n");
for (int i =0; i < m2; i++){
for (int j = 0; j < n2; j++)
scanf("%d", &b[i][j]);
}

//Calculates the sum of the arrays and stores it in an array named c
for (int i =0; i < m1; i++){
for (int j = 0; j < n1; j++){
c[i][j] = a[i][j] + b[i][j];
}
}
//prints the result
printf("The sum of the array is\n");
for (int i =0; i < m1; i++){
for (int j = 0; j < n1; j++){
printf("%d\t", c[i][j]);
}
printf("\n");
} }
else {
printf("The addition of matrices is not possible, Since the rows or columns does not match");
}