How to executing C++ programme -

i have simple c++ programme works fine on linux, when try execute on windows gives me this:

the ntvdm cpu hase encountered illegal instruction cs: 055 ip: 0185 op: of 00 00

this code of programme:

#include <iostream> using namespace std; int main() {     int n;     {cout<<"enter 2 or 3 : ";cin>>n;} while (n<2 || n>3);     int b;     cout<<"enter number of characters : ";cin>>b;cout<<endl;     char t[b];     cout<<"enter characters : ";cin>>t;cout<<endl;     string ta =t;     if(n==2) {         for(int r=0;r<b;r++){             for(int i=0;i<b;i++){                  cout<<ta[r]<<ta[i]<<endl;             }         }     }     else {         for(int r=0;r<b;r++){             for(int i=0;i<b;i++){                 for(int k=0;k<b;k++) {                     cout<<ta[r]<<ta[i]<<ta[k]<<endl;                 }             }         }     }     cout<<"all right reserved ©"<<endl;     return 0; } 

apart fact variable length arrays not supported in iso c++ , presumably allowed here extension in gcc, start buffer overrun: array t should @ least t[b+1] long, , trusting user not enter more characters promised.

since assign t std::string (ta), why not read input directly ta intrinsically safe (not mention valid iso c++)?

string ta ; cout << "enter characters : " ; cin >> ta ;