Compilare: user.cpp: In function ‘int nrdiv1(int)’: user.cpp:22:19: warning: left operand of comma operator has no effect [-Wunused-value] for(int i=0; i<np, prim[i]*prim[i]<=z; i++) ^ user.cpp: In function ‘int main()’: user.cpp:41:13: warning: unused variable ‘d’ [-Wunused-variable] int x,y,d,s=0,nrdiv,z; ^ user.cpp:41:15: warning: unused variable ‘s’ [-Wunused-variable] int x,y,d,s=0,nrdiv,z; ^ user.cpp:41:19: warning: unused variable ‘nrdiv’ [-Wunused-variable] int x,y,d,s=0,nrdiv,z; ^ user.cpp:41:25: warning: unused variable ‘z’ [-Wunused-variable] int x,y,d,s=0,nrdiv,z; ^ user.cpp:39:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("maxd.in", "r", stdin); ^ user.cpp:40:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("maxd.out", "w", stdout); ^ user.cpp:42:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &x,&y ); ^