Compilare: user.cpp: In function ‘int main()’: user.cpp:45:9: warning: unused variable ‘mystring’ [-Wunused-variable] char mystring [100]; ^ user.cpp:51:10: warning: unused variable ‘sir’ [-Wunused-variable] char sir[109]; ^ user.cpp:49:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("randuri.out","w",stdout); ^