Eroare de compilare: user.cpp: In function ‘void read()’: user.cpp:33: error: ‘strdup’ was not declared in this scope user.cpp:44: error: ‘strchr’ was not declared in this scope user.cpp:47: error: ‘strdup’ was not declared in this scope user.cpp:51: error: ‘strdup’ was not declared in this scope user.cpp:25: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:27: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result user.cpp:39: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:41: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:43: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result user.cpp: In function ‘long long int value(char*)’: user.cpp:63: error: ‘strchr’ was not declared in this scope user.cpp:64: error: ‘strncpy’ was not declared in this scope user.cpp: In function ‘char* find(char*)’: user.cpp:79: error: ‘strchr’ was not declared in this scope user.cpp:80: error: ‘strncpy’ was not declared in this scope user.cpp: In function ‘void make_number(long long int, char*)’: user.cpp:91: error: ‘strcpy’ was not declared in this scope user.cpp:99: error: ‘strlen’ was not declared in this scope user.cpp: In function ‘int solve()’: user.cpp:122: error: ‘strlen’ was not declared in this scope user.cpp:122: error: ‘strchr’ was not declared in this scope user.cpp:127: error: ‘strcpy’ was not declared in this scope user.cpp:128: error: ‘strtok’ was not declared in this scope user.cpp:149: error: ‘strdup’ was not declared in this scope user.cpp: In function ‘void write()’: user.cpp:167: warning: format ‘%d’ expects type ‘int’, but argument 3 has type ‘long long int’ user.cpp:168: warning: too few arguments for format