Compilare: user.cpp: In function ‘void v2()’: user.cpp:23:9: warning: unused variable ‘s’ [-Wunused-variable] int s=1,d=n,sol=0; ^ user.cpp:23:13: warning: unused variable ‘d’ [-Wunused-variable] int s=1,d=n,sol=0; ^ user.cpp: In function ‘int main()’: user.cpp:36:22: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&p); ^ user.cpp:37:22: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&n); ^ user.cpp:39:33: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d%d",&x[i],&y[i]); ^