Compilare: user.cpp: In function ‘void read()’: user.cpp:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp: In function ‘void prep2()’: user.cpp:104: warning: unused variable ‘bdist’ user.cpp: In function ‘void prep3()’: user.cpp:207: warning: unused variable ‘bdist’ user.cpp: In function ‘int main()’: user.cpp:298: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:299: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result