Compilare: user.cpp: In function ‘int subsec(int*, int)’: user.cpp:7: warning: unused variable ‘t’ user.cpp:8: warning: unused variable ‘s’ user.cpp: In function ‘int main()’: user.cpp:25: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:26: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:31: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp: In function ‘int subsec(int*, int)’: user.cpp:19: warning: ‘b’ may be used uninitialized in this function