#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#define N_MAX 10
#define N_MIN 2
#define TEMPSIZE 1024
float RowSum(float **matrix, int sizearray,int row) {
float sum;
for (int j=0 ; j <= row; j++) {
sum = 0;
for (int i=0 ; i < sizearray; i++) {
sum = sum + matrix[j][i];
}
}
return sum;
}
float ColSum(float **matrix, int sizearray, int col) {
float sum;
for (int j = 0; j <= col; j++) {
sum = 0;
for (int i = 0; i < sizearray; i++) {
sum = sum + matrix[i][j];
}
}
return sum;
}
int RepNum(int arraysize, float **matrix) {
int i, j, counter = 0;
int temparray[N_MAX*N_MAX];
for (i = 0; i < N_MAX*N_MAX; i++) {
temparray[i] = 0;
}
for (i = 0; i < arraysize; i++) {
for (j = 0; j < arraysize; j++) {
temparray[(int)matrix[i][j]]++;
}
}
for (i = 1; i < arraysize*arraysize; i++) {
if (temparray[i] > 1)
counter++;
}
return counter;
}
void PrintArray(float **matrix, int arraysize) {
for (int i = 0; i<arraysize; i++)
{
for (int j = 0; j<arraysize; j++)
printf("%3d ", (int)matrix[i][j]);
printf("\n");
}
}
int CheckInt(float **matrix, int arraysize) {
int counter = 0;
for (int i = 0; i < arraysize; i++) {
for (int j = 0; j < arraysize; j++) {
if (((int)matrix[i][j]) != matrix[i][j])
counter++;
}
}
return counter;
}
void main() {
printf("Hello! this program will help you to find out if you have a magic square!\nPlease enter your matrix order and following it the numbers you'd like to check: \n");
float **matrix;
char input[TEMPSIZE];
int sizear = 0;
float correctsum = 0.0;
int counter = 0, row, column;
fgets(input, TEMPSIZE, stdin);
char* str = strstr(input, " ");
if (str == 0)
return;
str[0] = 0;
str++;
sizear = atof(input);
if (sizear > N_MAX || sizear < N_MIN)
{
printf("ERROR: The matrix size cannot be %d size. \n", sizear);
exit(0);
}
matrix = (float**)calloc(1, sizear * sizeof(float*));
for (column = 0; column < sizear; column++)
{
matrix[column] = (float*)calloc(1, sizear * sizeof(float));
}
for (row = 0; row < sizear; row++)
{
for (column = 0; column < sizear; column++)
{
char* temp = strstr(str, " ");
if (temp == 0) /*gets the last number*/
{
++counter;
matrix[row][column] = atof(str);
goto end;
}
if (atof(temp) <= sizear*sizear && atof(temp) > 0) { /*puts all numbers in matrix*/
temp[0] = 0;
matrix[row][column] = atof(str);
str = temp + 1;
++counter;
}
else {
printf("you cannot enter the number %.3f \n", atof(temp));
exit(0);
}
}
}
end:
if (counter > sizear*sizear) {
printf("you've entered %d numbers, while you should've enter %d numners \n", counter, sizear*sizear);
}
else if (counter < sizear*sizear) {
printf("you've entered %d numbers, while you should've enter %d numners \n", counter, sizear*sizear);
}
else if (counter == sizear*sizear) {
correctsum = (float)((sizear*(sizear*sizear + 1)) / 2);
float row = RowSum(matrix, sizear, 0);
float coul = ColSum(matrix, sizear, 0);
if (row == coul && row== correctsum && coul==correctsum && RepNum(sizear, matrix) ==0 && CheckInt(matrix,sizear)==0) {
printf("It's a magic matrix!\n");
PrintArray(matrix, sizear);
}
else {
printf("Not a magic square:\n");
if (row != coul && row != correctsum && coul != correctsum) {
printf("* Coloums and rows sum do not match.\n");
}
if (RepNum(sizear, matrix) != 0) {
printf("* There are repeating numbers.\n");
}
if (CheckInt(matrix, sizear) != 0) {
printf("* One of the numbers or more you've entered isn't integer.\n");
}
}
}
for (column = 0; column < sizear; column++)
{
free(matrix[column]);
}
free(matrix);
}
When I hit more than sizearrayXsizearray numbers it doesn't add into the counter and stops at sizearrayXsizearray counting. Can anyone point out why it doesn't count it? The exercise asked to check if the input is a magic square (sum rows=columns=diagonals), making sure there are no duplicates, only int numbers and that I don't enter more or less than sizearrayXsizearray numbers. The input from the user should look like 3 1 2 3 4 5 6 7 8 9 where the first number (here it is 3) is the array size and the rest are the numbers that would be checked as a magic square.
