Compilare: user.cpp: In function ‘void citire()’: user.cpp:10: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:11: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp: In function ‘void dfsg(int)’: user.cpp:22: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘void dfsgt(int)’: user.cpp:28: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘int main()’: user.cpp:43: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:32: warning: ‘nr’ may be used uninitialized in this function