problem:
input three lines: first line has a number
second line have two numbers
third line has a string of characters( the number of characters is not more than 1000)

my code:


# include<iostream.h>
int main(void){
int a;
cin>>a;
cout<<a<<"\n";

int x, y;
cin>>x>>y;
cout<<x<<" "<<y<<"\n";

char str[1001];
cin.getline(str, 1000);
cout<<str[2]; /*I　put this line here to check whether the third line of input is read*/

return 0;
}

sample input and output:
first line input: 1
output: 1 // this is correct
second line input: 2 1
output: 2 1// this is also correc
but after the output 2 1 is displayed in the screen, the program suddenly end after prompting two blank lines..


the whole process is like this:
@sf3:~/c_programming[591]$ ./a.out
1
1
2 1
2 1

@sf3:~/c_programming[592]$



what is wrong with my code?
can anyone enlighten me?