Compilare: user.cpp: In function ‘int main()’: user.cpp:49:25: warning: unused variable ‘ok1’ [-Wunused-variable] int ok1=1; ^ user.cpp:69:25: warning: unused variable ‘ok1’ [-Wunused-variable] { int ok1=1; ^ user.cpp:24:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("multiplu.in","r",stdin); ^ user.cpp:25:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("multiplu.out","w",stdout); ^ user.cpp:28:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&a,&b); ^