Compilare: user.cpp: In function ‘int main()’: user.cpp:11:7: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(x1==0) ^ user.cpp:19:7: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(x2==0) ^ user.cpp:31:7: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(x2==0) ^ user.cpp:39:7: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(x1==0) ^ user.cpp:5:29: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("maxk.in","r",stdin); ^ user.cpp:6:31: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("maxk.out","w",stdout); ^ user.cpp:7:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&k); ^ user.cpp:10:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&v[i]); ^