Matrix multiplication in C

# 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", &m1);
printf("Enter the number of column of the first matrix: ");
scanf("%d", &n1);
printf("Enter the number of rows of the second matrix: ");
scanf("%d", &m2);
printf("Enter the number of column of the second matrix: ");
scanf("%d", &n2);
int a[m1][n1], b[m2][n2], c[m1][n2];

if (n1 != m2){
   printf("Matrix multiplication is not possible");
}
else {
//Input the first matrix
printf("Enter the elements of the first matrix: \n");
for (int i = 0; i < n1; i++){
   for (int j = 0; j < m1; j++)
   scanf("%d", &a[i][j]);
}

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

//Matrix multiplication and storing
printf("The matrix multiplication is \n");
for (int i = 0; i < m1; i++){
    for (int j = 0; j< n2; j++){
       c [i][j] = 0;
       for (int k = 0; k <n1; k++){
       c [i] [j] = c [i] [j] + ( a[j] [k] * b [k] [j] );
        }
    }
}

//Print the matrix c
for (int i = 0; i < m1; i++){
        printf("\n");
    for (int j = 0; j < n2; j++){
        printf ("%d\t", c [i][j]);
   }}
}
return 0;
}