Compilare: user.cpp: In function ‘int main()’: user.cpp:78:11: warning: unused variable ‘st’ [-Wunused-variable] int i,st,dr,x,y,k=0,j; ^ user.cpp:78:14: warning: unused variable ‘dr’ [-Wunused-variable] int i,st,dr,x,y,k=0,j; ^ user.cpp:78:17: warning: unused variable ‘x’ [-Wunused-variable] int i,st,dr,x,y,k=0,j; ^ user.cpp:78:19: warning: unused variable ‘y’ [-Wunused-variable] int i,st,dr,x,y,k=0,j; ^ user.cpp:80:22: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&n); ^ user.cpp:83:29: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&v[i]); ^