View Compilation Error

0_0_17435513_7866.cpp: In member function 'void MAT::gauss_eliminate()':
0_0_17435513_7866.cpp:132:40: error: 's' was not declared in this scope
                 for(int k = i+1; k < r;s ++k)
                                        ^
0_0_17435513_7866.cpp:132:44: error: expected ')' before 'k'
                 for(int k = i+1; k < r;s ++k)
                                            ^
0_0_17435513_7866.cpp:132:45: error: expected ';' before ')' token
                 for(int k = i+1; k < r;s ++k)
                                             ^