ferma1.cpp: In function `void C2()': ferma1.cpp:41: warning: unused variable `int x1' ferma1.cpp:41: warning: unused variable `int x2' ferma1.cpp:41: warning: unused variable `int x3' ferma1.cpp:41: warning: unused variable `int x4' ferma1.cpp:40: warning: `int x' might be used uninitialized in this function ferma1.cpp:40: warning: `int y' might be used uninitialized in this function ferma1.cpp:42: warning: `char sol' might be used uninitialized in this function