Compilare: user.cpp: In function ‘int main()’: user.cpp:48:12: warning: unused variable ‘m’ [-Wunused-variable] int n,i,m=1,maxi=0,nr=0; ^ user.cpp:50:21: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&n); ^ user.cpp:54:50: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d%d%d",&c[i].x,&c[i].y,&c[i].r); ^ user.cpp:74:13: warning: ‘x’ may be used uninitialized in this function [-Wmaybe-uninitialized] if(c[i].x-(double)(c[i].x*c[i].r)/(double)sqrt(c[i].x*c[i].x+c[i].y*c[i].y) > x) ^