ferma1.cpp: In function 'int main()': ferma1.cpp:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result ferma1.cpp:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result ferma1.cpp:39: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result ferma1.cpp:41: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result ferma1.cpp:43: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result ferma1.cpp:62: warning: 'x' may be used uninitialized in this function ferma1.cpp:62: warning: 'y' may be used uninitialized in this function ferma1.cpp:63: warning: 'color' may be used uninitialized in this function