Compilare: user.cpp: In function ‘int main()’: user.cpp:39:34: warning: left operand of comma operator has no effect [-Wunused-value] printf("%d %d\n",x*(c/d,y*(c/d))); ^ user.cpp:39:45: warning: format ‘%d’ expects a matching ‘int’ argument [-Wformat=] printf("%d %d\n",x*(c/d,y*(c/d))); ^ user.cpp:26:26: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen(in,"r",stdin); ^ user.cpp:27:28: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen(out,"w",stdout); ^ user.cpp:30:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.cpp:34:33: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d",&a,&b,&c); ^