Compilare: user.cpp: In function ‘void v2()’: user.cpp:42:32: warning: operation on ‘j’ may be undefined [-Wsequence-point] if(j<n){v[j]=v[++j]; v[j]=aux;} ^ user.cpp: In function ‘int main()’: user.cpp:57:34: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d %d %d",&p,&n,&k); ^ user.cpp:59:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d", &v[i]); ^ user.cpp: In function ‘void v2()’: user.cpp:51:5: warning: ‘dr’ may be used uninitialized in this function [-Wmaybe-uninitialized] if(dr==n+1) dr=1; ^ user.cpp:50:5: warning: ‘st’ may be used uninitialized in this function [-Wmaybe-uninitialized] if(st==0) st=n; ^