Eroare de compilare: user.cpp: In function ‘void citire()’: user.cpp:14: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:18: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp: In function ‘void rezolva()’: user.cpp:31: warning: comparison between signed and unsigned integer expressions user.cpp:51: warning: comparison between signed and unsigned integer expressions user.cpp:64: error: ‘sort’ was not declared in this scope user.cpp: In function ‘void afisare()’: user.cpp:69: warning: comparison between signed and unsigned integer expressions