Compilare: user.cpp: In function ‘int main()’: user.cpp:30:15: warning: unused variable ‘lg’ [-Wunused-variable] int i,n,j,lg,act,prev; ^ user.cpp:32:26: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &n); ^ user.cpp:34:31: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", v+i); ^ user.cpp:71:58: warning: ‘act’ may be used uninitialized in this function [-Wmaybe-uninitialized] fprintf(fout, "%d %d", lgmax[act][n], nrlgmax[act][n]); ^