c++ - Strange syntax flaw in mingw -

at line 23- cout<"" doesnt give error instead removing statement produces abnormal output. have tried in codeblocks using mingw32. when remove gives- process returned 1984687287 (0x764df487)

#include<iostream> #include<stdio.h>  using namespace std;  int ispalin(long num) {     long sum=0,n;     short rem;     n=num;      while(n>0) {         rem=n%10;         sum=sum*10+rem;         n/=10;     }      if(sum==num)return 1;         return 0; }  int main() {     int n=1;     for(int i=999;i>=1;i--) {         for(int j=999;j>=1;j--)         {             if((i*j)<=n)             {                 cout<""; // line 23                 break;             }             if((i*i)<=n)             {                 printf("%d",n);                 return 0;             }             if(ispalin(i*j))             {                 n=i*j;                 cout<<n<<"\n";                 break;             }         }     }     return 1; } 

it doesn't give error because it's legal, albeit fruitless, statement. ostream objects implicitly convertible void*. expression results in comparison between void* , const char*, legal.

as error when remove statement, cannot reproduce it.