Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:9:11: error: ‘k’ was not declared in this scope for(x[k++]=2,i=1;2*i+1<=n;i++) ^ user.cpp:12:15: error: ‘k’ was not declared in this scope for(i=0;i<k&&x[i]*x[i]<=m;i++) { ^ user.cpp:21:19: error: ‘k’ was not declared in this scope for(l=0;l<k&&x[l]*x[l]<=j;l++) ^ user.cpp:25:19: error: ‘k’ was not declared in this scope for(l=0;l<k&&x[l]*x[l]<=e;l++) ^ user.cpp:4:94: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("chernel.in","r",stdin),freopen("chernel.out","w",stdout),scanf("%d%d",&n,&m),n--; ^ user.cpp:4:94: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:4:94: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]