Basic Lectures on C

Test1.c

int main()
{
    int a = 5;
    int* b = &a;
    int c[] = {1, 2, 3, 4, 5};
    return 0;
}

Test2.c

int main()
{
    short s = 5;    // 2
    short int si = 5;   // 2
    int i = 5;  // 4
    long l = 5; // 4; 5012
    long int li = 5;    // 5012-4=5008
    long long ll = 5;
    long long int lli = 5;
    char c = 'a';
    return 0;
}

Test3.c

int main()
{
    int a = 5;
    long long b = &a;
    int* c = &a;
    int d = *c;
    return 0;
}

Test4.c

int main()
{
    int a[] = {1, 2, 3, 4, 5};  // &, *, &c, &c[0], c+0, c[5], &c[5], c+5, *(c+5)
    int* b = a;
    int* c = &a;
    *(int*)(b+4);
    return 0;
}