C program to check if the generated matrix is a magic squadre

magic_square.c

#include <stdio.h>
#include <time.h>  /* for time() */
#include <stdlib.h>  /* for rand() and srand() */

int check_square(int square[][100], int );
void generate(int matrix[][100], int );


int main() {

    int size_matrix = 100, magic_square = 0, successi = 0;
    int matrix[100][100];


    printf("Inserire la dimensione del quadrato: ");
    scanf("%d", &size_matrix);


    generate(matrix, size_matrix); // generating random matrix


    for (int i = 0; i < 1000; ++i) {

        if (check_square(matrix, size_matrix)) {

            magic_square++;
        };
        
    }

    //calculate percentage of success
    successi = magic_square / 1000 * 100;

    printf("La percentuale di successi è: %d %%", magic_square);

}

int check_square(int square[][100], int size ){

    int rowsum, columnsum, diagonalsum = 0, diagonalminsum = 0, compare = 0;

    for(int i = 0; i < size; i++)
    {

        //calculate diagonal min and diagonal mag
        diagonalsum += square[i][i];
        diagonalminsum += square[i][size-1-i];

        rowsum = 0;
        columnsum = 0;

        for(int j = 0; j < size; j++)
        {
            rowsum += square[i][j];
            columnsum += square[j][i];
        }

        //Get a copy of the first row
        if (i == 0) {

            compare = rowsum;

        }


        //Check if the rows and columns are all equal
        if (compare != rowsum || compare != columnsum) {

            return 0;

        }

    }

    if (diagonalsum != compare || diagonalminsum != compare) {

        return 0;

    }


    return 1;


};

//Function to generate random matrix

void generate (int matrix[][100], int size_matrix) {

    srand(time(NULL)); // creating random matrix

    for ( int i = 0; i < size_matrix; i++) {

        for ( int j = 0; j < size_matrix; j++) {

            matrix[i][j] = rand() % 10 + 1;
        }
    }

}