Eroare de compilare: user.cpp: In function ‘void read()’: user.cpp:35: error: ‘strchr’ was not declared in this scope user.cpp:38: error: ‘strdup’ was not declared in this scope user.cpp:42: 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:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:33: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:34: 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:53: error: ‘strchr’ was not declared in this scope user.cpp:54: error: ‘strncpy’ was not declared in this scope user.cpp: In function ‘char* find(char*)’: user.cpp:68: error: ‘strchr’ was not declared in this scope user.cpp:69: error: ‘strncpy’ was not declared in this scope user.cpp: In function ‘void make_number(long long int, char*)’: user.cpp:87: error: ‘strlen’ was not declared in this scope user.cpp: In function ‘int solve()’: user.cpp:111: error: ‘strlen’ was not declared in this scope user.cpp:111: error: ‘strchr’ was not declared in this scope user.cpp:116: error: ‘strcpy’ was not declared in this scope user.cpp:117: error: ‘strtok’ was not declared in this scope user.cpp:138: error: ‘strdup’ was not declared in this scope user.cpp: In function ‘void write()’: user.cpp:157: warning: too few arguments for format