Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:48: error: ‘strcpy’ was not declared in this scope user.cpp:51: error: ‘strtok’ was not declared in this scope user.cpp:59: error: ‘strlen’ was not declared in this scope user.cpp:60: error: ‘strchr’ was not declared in this scope user.cpp:73: error: ‘strncpy’ was not declared in this scope user.cpp:80: error: ‘atoi’ was not declared in this scope user.cpp:87: error: ‘itoa’ was not declared in this scope user.cpp:104: error: ‘strncpy’ was not declared in this scope user.cpp:111: error: ‘atoi’ was not declared in this scope user.cpp:116: error: ‘sort’ was not declared in this scope user.cpp:119: error: ‘itoa’ was not declared in this scope user.cpp:135: error: ‘atoi’ was not declared in this scope