Eroare de compilare: user.cpp: In function ‘int comp(const void*, const void*)’: user.cpp:9: error: ‘strcmp’ was not declared in this scope user.cpp: In function ‘int main()’: user.cpp:20: warning: suggest parentheses around ‘&&’ within ‘||’ user.cpp:61: error: ‘strcpy’ was not declared in this scope user.cpp:96: warning: suggest parentheses around ‘&&’ within ‘||’ user.cpp:108: warning: suggest parentheses around ‘&&’ within ‘||’ user.cpp:125: error: ‘strlen’ was not declared in this scope user.cpp:19: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result