Eroare de compilare: user.cpp: In function ‘void folder()’: user.cpp:11: error: ‘strchr’ was not declared in this scope user.cpp:13: error: ‘strcpy’ was not declared in this scope user.cpp:14: error: ‘strlen’ was not declared in this scope user.cpp: In function ‘void fisier()’: user.cpp:44: warning: suggest parentheses around ‘&&’ within ‘||’ user.cpp:49: error: ‘strcat’ was not declared in this scope user.cpp:52: error: ‘strcat’ was not declared in this scope user.cpp:54: error: ‘strlen’ was not declared in this scope user.cpp: In function ‘void sortare()’: user.cpp:65: error: ‘strcmp’ was not declared in this scope user.cpp:67: error: ‘strcpy’ was not declared in this scope