Compilare: user.cpp: In function ‘int main()’: user.cpp:8:33: warning: unused variable ‘i’ [-Wunused-variable] int n,da,gr,x,y,s,contm,con,i,j; ^ user.cpp:8:35: warning: unused variable ‘j’ [-Wunused-variable] int n,da,gr,x,y,s,contm,con,i,j; ^ user.cpp:11:36: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d %d %d",&n,&da,&gr); ^ user.cpp:21:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d %d",&x,&y); ^ user.cpp:26:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d %d",&x,&y); ^