Compilare: user.cpp: In function ‘int main()’: user.cpp:2:347: warning: statement has no effect [-Wunused-value] using namespace std;int v[10];ifstream fin("numar3.in");ofstream fout("numar3.out");int main(){int n,i,x=-1,y,ua=10,a,j;char c;fin>>n;for(i=1;i<=n;i++){fin>>c;a=c-'0';if(a>ua){j=9;if(x!=-1)fout<<y;if(x==-1)x=1;for(;x<i-1;x++){while(v[j]==0)j--;fout<<j;v[j]--;}v[ua]--;x=i;y=ua;}v[a]++;ua=a;}v[y]++;j=y+1;while(v[j]==0)j++;fout<<j;v[j]--;j=0;for(x;x<=n;x++) {while(v[j]==0)j++;fout<<j;v[j]--;}return 0;} ^ user.cpp:2:304: warning: ‘y’ may be used uninitialized in this function [-Wmaybe-uninitialized] using namespace std;int v[10];ifstream fin("numar3.in");ofstream fout("numar3.out");int main(){int n,i,x=-1,y,ua=10,a,j;char c;fin>>n;for(i=1;i<=n;i++){fin>>c;a=c-'0';if(a>ua){j=9;if(x!=-1)fout<<y;if(x==-1)x=1;for(;x<i-1;x++){while(v[j]==0)j--;fout<<j;v[j]--;}v[ua]--;x=i;y=ua;}v[a]++;ua=a;}v[y]++;j=y+1;while(v[j]==0)j++;fout<<j;v[j]--;j=0;for(x;x<=n;x++) {while(v[j]==0)j++;fout<<j;v[j]--;}return 0;} ^