Compilare: user.cpp: In function ‘int main()’: user.cpp:29:19: warning: unused variable ‘b’ [-Wunused-variable] int i,n,con,k,b,e,aux,m,j; ^ user.cpp:29:21: warning: unused variable ‘e’ [-Wunused-variable] int i,n,con,k,b,e,aux,m,j; ^ user.cpp:33:29: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d%d" ,&n,&k); ^ user.cpp:36:39: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d%d" ,&x[i],&y[i]); ^