macheta.cpp: In function `int piv(int, int)': macheta.cpp:11: warning: `bool ok' might be used uninitialized in this function macheta.cpp: In function `int main()': macheta.cpp:40: warning: int format, different type arg (arg 2) macheta.cpp:40: warning: int format, different type arg (arg 3) macheta.cpp:40: warning: int format, different type arg (arg 4) macheta.cpp:40: warning: int format, different type arg (arg 5) macheta.cpp:40: warning: int format, different type arg (arg 6) macheta.cpp:35: warning: unused variable `int j' macheta.cpp:35: warning: `int max' might be used uninitialized in this function