Compilare: user.cpp: In function ‘int main()’: user.cpp:70: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:71: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:72: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:73: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:74: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:77: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp: In function ‘int cautbin0(int)’: user.cpp:6: warning: ‘m’ may be used uninitialized in this function user.cpp: In function ‘int cautbin1(int)’: user.cpp:24: warning: ‘m’ may be used uninitialized in this function user.cpp: In function ‘int cautbin2(int)’: user.cpp:47: warning: ‘m’ may be used uninitialized in this function