#include #include #include using namespace std; float& component(float* v, int k) { return v[k - 1]; } int& max(int& m, int& n) { return (m > n ? m : n); }; void get(double*& , int& ); void print(double* , int ); int main() { int n = 20; int *pn = &n; cout << pn <<" \t pn"<< endl; cout << n << "\t n" << endl; cout << *pn + 2 << " \t *pn+2" << endl; int **pnn = &pn; cout << pnn << " \t pnn " << endl; pnn+1; ++n; n++; cout << pn << " \t pn ++n , n++ " << endl; // اشاره گر cout << pnn << " \t pnn+1" << endl; //اشاره گر به اشاره گر cout << *pn << " \t *pn" << endl;// مقدار متغیر ان cout << *pnn << " \t *pnn" << endl;//مقدار اشاره گر به اشاره گر = آدرس متغیر ان cout << *pnn << " \t **pnn" << endl;//مقدار اشاره گر به اشاره گر = آدرس متغیر ان cout << &pnn << " \t &&pnn" << endl;//ادرس اشاره گر به اشاره گر cout << "**********ashre gar koli ********" << endl; { int n = 44; cout << " n = " << n << endl; cout << " &n = " << &n << endl; int* pn = &n; // pn holds the address of n cout << " pn = " << pn << endl; cout << " &pn = " << &pn << endl; cout << " *pn = " << *pn << endl; int** ppn = &pn; // ppn holds the address of pn cout << " ppn = " << ppn << endl; cout << " &ppn = " << &ppn << endl; cout << " *ppn = " << *ppn << endl; cout << "**ppn = " << **ppn << endl; } cout << "*********f() left meghdar *********" << endl; { int m = 44, n = 22; cout << m << ", " << n << ", " << max(m, n) << endl; max(m, n) = 55; cout << m << ", " << n << ", " << max(m, n) << endl; }; cout << "******************meghdar dehi be array az 1 be jaie az 0 ************" << endl; { float v[4]; for (int k = 1; k <= 4; k++) component(v, k) = 1.0 / k; for (int i = 0; i < 4; i++) cout << "v[" << i << "] = " << v[i] << endl; } cout << "******************array peymaiesh with ashare gar*********** " << endl; { const int SIZE = 3; short a[SIZE] = { 22, 33, 44 }; cout << "a = " << a << endl; cout << "sizeof(short) = " << sizeof(short) << endl; short* end = a + SIZE; // converts SIZE to offset 6 short sum = 0; for (short* p = a; p < end; p++) { sum += *p; cout << "\t p = " << p; cout << "\t *p = " << *p; cout << "\t sum = " << sum << endl; } cout << "end = " << end << endl; } cout << "*********افزایش اشاره گر *********" << endl; { float a[8]; float* p = a; cout << p << endl; cout << sizeof(a[0]) << endl; // p points to a[0] ++p; // increases the value of p by sizeof(float) cout << p << endl; ++p; cout << p << endl; } cout << "*********array 2 *********" << endl; { short a[] = { 22, 33, 44, 55, 66 }; cout << "a = " << a << ", *a = " << *a << endl; for (short* p = a; p < a + 5; p++) cout << "p = " << p << ", *p = " << *p << endl; } cout << "*******array 3***********" << endl; { int g[] = { 44, 45, 46, 47 }; cout << g << " "; cout << &g<< endl; }; cout << "*******array 4 (puya)***********" << endl; { double* a;// a is simply an unallocated pointer int n; get(a, n); // now a is an array of n doubles print(a,n); delete[] a;// now a is simply an unallocated pointer again get(a, n); // now a is an array of n doubles print(a,n); } getchar(); } void get(double*& a, int& n) { cout << "Enter number of items: "; cin >> n; a = new double[n]; cout << "Enter " << n << " items, one per line:\n"; for (int i = 0; i < n; i++) { cout << "\t" << i + 1 << ": "; cin >> a[i]; } } void print(double* a, int n) { for (int i = 0; i < n; i++) cout << a[i] << " "; cout << endl; }

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