Mama eisai spiti? Giati se pairnw kai milaei

#include <stdio.h>
#include <stdlib.h>
#define N 10
#define M 20

const float right = -5.0, left = 4.0, up = 2.0, down = 3.0;

void createL(float t[N][M]);
void createU(float t[N][M]);
void createR(float t[N][M]);
void createD(float t[N][M]);
void calcCorners(float t[N][M]);
void printarray(float*);
void initialize(float t[N][M]);
void loadTemp(float tTemp[N][M], float*);
float next(int, int, float t[N][M]);

int main() {
    float t[N][M], tNew[N][M], tTemp[N][M];
    float* ptr;
    float* ptrNew;
    float* ptrTemp;
    int i, j, k;
    int time;

    ptr = &t[0][0];
    ptrNew = &tNew[0][0];

    initialize(t);
    printarray(ptr);

    while(1)
    {
        ptrTemp = &t[0][0];
        printf("Enter an integer for the time: ");
        scanf("%d", &time);

        if (time!=0)
        {
            loadTemp(tTemp, ptrTemp);
            for (k=0; k<time; k++)
            {
                for (i=0; i<N; i++)
                {
                    if (i != 0 && i != N - 1)
                    {
                        for (j=0; j<M; j++)
                        {
                            if (j != 0 && j != M - 1)
                            {
                                tNew[i][j] = next(i, j, tTemp);
                            }
                        }
                    }
                }
                createL(tNew);
                createR(tNew);
                createD(tNew);
                createU(tNew);
                calcCorners(tNew);
                ptrTemp = &tNew[0][0];
                loadTemp(tTemp, ptrTemp);
                /*printarray(&tTemp[0][0]);*/
            }
        }
        else
        {
            return 0;
        }
        printarray(ptrNew);
      /*  printarray(ptrTemp);*/
    }

    return 0;
}

void loadTemp(float tTemp[N][M], float* ptrTemp)
{
    int i, j;
    for (i=0; i<N; i++)
    {
        for (j=0; j<M; j++)
        {
            tTemp[i][j] = *(ptrTemp + M*i + j);
        }
    }
    return;
}

void calcCorners(float t[N][M])
{
    float ur, ul, dr, dl;
    ur = ( right + up ) / 2;
    dr = ( right + down ) / 2;
    ul = ( left + up ) / 2;
    dl = ( left + down ) / 2;
    t[0][0] = ul;
    t[0][M-1] = ur;
    t[N-1][0] = dl;
    t[N-1][M-1] = dr;
    return;
}

void createR(float t[N][M])
{
    int i;
    for (i=0; i<N; i++)
    {
        t[i][M-1] = right;
    }
    return;
}

void createL(float t[N][M])
{
    int i;
    for (i=0; i<N; i++)
    {
        t[i][0] = left;
    }
    return;
}

void createD(float t[N][M])
{
    int i;
    for (i=0; i<M; i++)
    {
        t[N-1][i] = down;
    }
    return;
}

void createU(float t[N][M])
{
    int i;
    for (i=0; i<M; i++)
    {
        t[0][i] = up;
    }
    return;
}

void initialize(float t[N][M])
{
    int i, j;
    printf("Time: 0\n");
    for (i=0; i<N; i++)
    {
        for (j=0; j<M; j++)
        {
            t[i][j] = 1.0;
        }
    }
    createL(t);
    createR(t);
    createD(t);
    createU(t);
    calcCorners(t);
    return;
}

void printarray(float* pointer)
{
    int i, j;
    for (i=0; i<N; i++)
    {
        for (j=0; j<M; j++)
        {
            printf("%.2f\t", *(pointer + M*i + j));
        }
        putchar('\n');
    }
    printf("\n------------------------------------------------------\n");
    return;
}

float next(int i, int j, float t[N][M])
{
    float tNewElement;
    tNewElement = 0.1 * (t[i-1][j-1] + t[i-1][j] + t[i-1][j+1] + t[i][j-1] + 2 * t[i][j] + t[i][j+1] + t[i+1][j-1] + t[i+1][j] + t[i+1][j+1]);
    return tNewElement;
}