View Compilation Error

0_0_28563970_17351.cpp: In function 'int main()':
0_0_28563970_17351.cpp:150:23: error: expected ')' before ';' token
   while(int mark_cnt=1;mark_cnt<n;++mark_cnt)
                       ^
0_0_28563970_17351.cpp:150:24: error: 'mark_cnt' was not declared in this scope
   while(int mark_cnt=1;mark_cnt<n;++mark_cnt)
                        ^