syntax

#include <stdio.h>
#include <malloc.h>

typedef long long int pizdec;

void changeValue(int *val, const int a) {
    *val = 5;
    printf("%d", a);
}

int Hello()
{
    return printf("Hello");
}
int World()
{
    return printf("World !");
}

//typedef, struct params
typedef struct rec {
    int num;
    char name[20];
} Rec;

//unions
union uni {
    int val;
    char a[4];
};

void recFoo(Rec rec) {
    rec.num;
}


int main() {

    //enums
    enum sex {MALE=0, FEMALE=1};
    enum sex male;
    enum sex female;
    male = MALE;
    female = FEMALE;
    printf("%d\n", male < female);

    //undefined behaviour
    for (int i = 0; i < 100; ++i) {
        int a = Hello() + World();
    }
    for (int j = 0; j < 1; ++j) {
        int i = 0;
        i = ++i + ++i;
        printf("%d\n", i);
    }

    //pointers
    int val = 4;
    changeValue(&val, 3);
    int *addr = &val;
    printf("%d\n", *addr);
    printf("%d\n", val);


    //arrays
    int *arr[10];
    int b = 2;
    arr[0] = &b;
    printf("%d\n", *arr[0]);

    //typedef
    pizdec a = 1000000;
    printf("%d\n", a);

    //dynamic arr, pointers
    int *dynamicArr = malloc(sizeof(int)*2);
    dynamicArr[0] = 1;
    dynamicArr[1] = 2;
    dynamicArr = realloc(dynamicArr, sizeof(int)*3);
    int *pointer = &dynamicArr[0];
    pointer++;
    printf("%d\n", *pointer);

    //function pointer
    void (*foo) (int*, const int);
    foo = changeValue;
    foo(&val, 5);
}