View Compilation Error

0_0_36694409_29091.cpp: In member function 'void MAT::gauss_eliminate()':
0_0_36694409_29091.cpp:150:24: error: 's' was not declared in this scope
 for(int k = i+1; k < r;s ++k)
                        ^
0_0_36694409_29091.cpp:150:28: error: expected ')' before 'k'
 for(int k = i+1; k < r;s ++k)
                            ^
0_0_36694409_29091.cpp:150:29: error: expected ';' before ')' token
 for(int k = i+1; k < r;s ++k)
                             ^