Compilare: user.cpp: In function ‘int main()’: user.cpp:16:51: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d%d%d%d%d%d",&p,&m,&n,&xc,&yc,&nrv); ^ user.cpp:23:36: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d%d%d",&x,&y,&r); ^ user.cpp:41:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&nrg); ^ user.cpp:45:43: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d%d%d%d",&x,&y,&x1,&y1); ^ user.cpp:110:31: warning: ‘d’ may be used uninitialized in this function [-Wmaybe-uninitialized] g<<x1<<" "<<y1<<" "<<d; ^