C++ Infinite Sum Code Hanging? Freezing? I'm not sure -

okay, i'm trying compute infinite sum using loop instead of while loop, , darn code isn't working , i'm not sure why. 2 "i got here"'s once , nothing. :\

does know why code isn't working , looks freezes or hangs? loops should end way made them, right? here's current problem code

        check=0;         cerr << "i got here" << endl;         (int m=1;m<m+1;m++)         {           cerr << "i got here" << endl;             (int n=1;n<n+1;n++)             {                 if (check==0)                 {                   anaphi[i][j][k]=1.0/(m*m*m*n*n*n)                   *cos(k*deltat*sqrt(5.0)*pi/4.0                   *sqrt(m*m+4.0*n*n))                   *sin(m*pi*i*h/4.0)                   *sin(n*pi*j*h/2.0);                   check=1;                 }                 else                 {                   anaphi[i][j][k]= anaphi[i][j][k]                   +1.0/(m*m*m*n*n*n)                   *cos(k*deltat*sqrt(5.0)*pi/4.0                   *sqrt(m*m+4.0*n*n))                   *sin(m*pi*i*h/4.0)                   *sin(n*pi*j*h/2.0);                 }             }         }     } 

i tested code , code doesn't work!

#include <iostream> #include <cmath> using namespace std;  int main() {     int b=0;     (int m=1;m<m+1;m=m+2)     {         b=cos(b)+sqrt(b);     }     cout << b << endl;     return 0; } 

i see couple of issues.

1. if(check=0) set check 0.

2. because use n= n+2, not ever break. because @ point n = 0x7ffffffe (highest positive number) , in case n+1 > n. wraps 0x80000000 (the negative signed int, still even) , n+1 still > n. if able n = 0x7fffffff, n + 1 less n due integer wrap around.

3. there not seem other way break out of loops meeting coditions set.