Compilare: user.cpp: In function ‘int subsec(int*, int)’: user.cpp:19: warning: suggest explicit braces to avoid ambiguous ‘else’ user.cpp:11: warning: unused variable ‘i’ user.cpp:11: warning: unused variable ‘t’ user.cpp:12: warning: unused variable ‘s’ user.cpp: In function ‘int main()’: user.cpp:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:39: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:42: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:43: 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:31: warning: ‘b’ may be used uninitialized in this function