xcode crashes after trying to build my code for a second time

Hello,

I have recently started coding in c++, using xcode's command line tool (university project). Ever since I started using this Apple made app on my 2022 macbook air M2, I am battling a major issue. Every time I try to either build my project for the second time or to clear the console, after I have made some input through the console, the Xcode crashes. I've been looking for the solution for weeks now, even reinstalled the whole xcode app, but nothing helped. I will be very much grateful for any suggestions... thanks. Here is one of my codes, where the issue appears:

// Hlavickove soubory
#include <stdlib.h>  // Standardni knihovna
#include <stdio.h>   // Standardni input, output
#include <math.h>    // Matematicka knihovna

#define N_MAX 100

// Samotny program
int main()      // Zahlavi hlavni funkce
{
    int n, max, i, souradnice_je_0;         // Definice promennych a jejich nastaveni do vychozich hodnot
    float a[N_MAX], ap, gp, hp;
    souradnice_je_0 = 1;
    max = 100;
    ap = 0;
    gp = 1;
    hp = 0;
    
Znovu:
    
    printf("\n Zadej dimenzi vektoru n: ");
    scanf("%i", &n);        // Zadani poctu dimenzi
    
    if(n>N_MAX)     // Osetreni maxima dimenzi
    {
        printf("\n Chyba v datech: Zadaná dimenze n musí být menší než %i", max);
        goto Znovu;
    }
    else if(n<=0)     // Osetreni kladnosti dimenzi
    {
        printf("\n Chyba v datech: Zadaná dimenze n musí být větší než 0");
        goto Znovu;
    }
    else
    {
        if(n == 1)        // Kontrola gramatiky:Dd
        {
            printf("\n Vektor má %i dimenzi", n);
        }
        else if(n>1 and n<5)
        {
            printf("\n Vektor má %i dimenze", n);
        }
        else
        {
            printf("\n Vektor má %i dimenzí", n);
        }
    }
    
    for(i = 0; i < n; i++)      // Zadani souradnic vektoru
    {
        printf("\n Zadej hodnotu x[%i] souřadnici vektoru: ", i);
        scanf("%f", &a[i]);
        printf("x[%i] = %g",i, a[i]);
        if(a[i] == 0)         // Kontrola zda a[i] je 0 kvuli h.p.
        {
            ap = ap + a[i];     // Arit. prumer 1. cast
            gp = gp * a[i];     // Geom. prumer 1. cast
            souradnice_je_0 = 0;       // Switch kvuli deleni nulou
        }
        else
        {
            ap = ap + a[i];           // Arit. prumer 1. cast
            gp = gp * a[i];           // Geom. prumer 1. cast
            hp = hp + (1 / a[i]);     // Harm. prumer 1. cast
        }
    }
    if(hp==0)
    {
        souradnice_je_0 = 0;       // Switch kvuli deleni nulou
    }
    
    ap = ap /n;           // Arit. prumer 2. cast
    printf("\n Aritmeticky prumer je: %g", ap);
    
    if(gp>=0)           // Nelze odmocnit zaporne cislo
    {
        gp = pow(gp, 1./n);     // Geom. prumer 2. cast
    }
    
    if(gp>=0)
    {
        printf("\n Geometricky prumer je: %g", gp);
    }
    else
    {
        printf("\n Geometricky prumer neni pro zadany vektor definovan");
    }
    
    if(souradnice_je_0 == 0)
    {
        printf("\n Harmonicky prumer neni pro zadany vektor definovan \n");
    }
    else
    {
        hp = n / hp;        // Harm. prumer 2. cast
        printf("\n Harmonicky prumer je: %g \n", hp);
    }
   
    return 0;
}