c++ class the output doesn't display completely -

this code produces no errors, in output line show program exits:

cout << "write 1 areaoftrapezium , 2 areaofrhombus , 3                      areaofparallelogram " << endl; cin >> option; 

and here full code don't know wrong

#include<iostream> using namespace std;   class project {  private: float base, base2, height; float diagonal, diagonal2; float base3, aldtude;   public: void trapezium() {      float areaoftrapezium;     areaoftrapezium = 0.5*(base + base2)*height;     cout << "the area of trapezium is:" << areaoftrapezium;   } void rhombus() {      float areaofrhombus;     areaofrhombus = 0.5*diagonal*diagonal2;     cout << "the  area of rhombus is:" << areaofrhombus; } void parallelogram() {      float areaofparallelogram;     areaofparallelogram = base3*aldtude;     cout << "the  area of parallelogram is:" << areaofparallelogram; }  project(int a, int b, int c){     base = a;     base2 = b;     height = c; } project(int d, int e) {      diagonal = d;     diagonal2 = e;  }   float getbase() {     return base; } float getbase2() {     return base2; } float getheight() {     return height; } float getdiagonal() {     return diagonal;  } float getdiagonal2() {     return diagonal2; } float getbase3() {     return base3; } float getaldtude() {     return aldtude; } };  int main()     {     int a, b, c, d, e, f, h;  int option = 0;  project obj();   cout << "write 1 areaoftrapezium , 2 areaofrhombus , 3 areaofparallelogram " << endl; cin >> option; switch (option) {  case  '1': {     cout << "enter value 2 bases & height of trapezium: " <<     endl;     cin >> a;     cin >> b;     cin >> c;       project obj(a, b, c);      obj.trapezium();  } break;  case  '2': {     cout << "enter diagonals of given rhombus:" << endl;     cin >> d;     cin >> e;     project obj( d,  e);     obj.rhombus(); } break;  case  '3': {     cout << "enter base , altitude of given parallelogram:  " << endl;     cin >> f;     cin >> h;     project obj( f,  h);      obj.parallelogram();  } break;  }  system("pause"); return 0;  } 

please tell me i'm missing?

you confusing numbers, one, digits, '1'. different things. number 1 how many heads have. digit "1" mark can represent number 1 in arabic numeral system.

int option = 0; 

okay, option integer.

cin >> option; 

and read integer user.

switch (option) { case  '1': 

and compare character 1, except wanted compare number one.

if read numbers user, compare them numbers one. if read characters user, compare them characters '1'. keep straight.