Compilare: user.cpp: In function ‘int desc(int)’: user.cpp:9:19: warning: unused variable ‘nrdiv’ [-Wunused-variable] int i=3, d=0, nrdiv=0; ^ user.cpp: In function ‘int main()’: user.cpp:36:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen( "perechi.in", "r", stdin ); ^ user.cpp:37:42: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen( "perechi.out", "w", stdout ); ^ user.cpp:41:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf( "%d", &n ); ^