Compilare: main.cpp: In function 'int main()': main.cpp:44:15: warning: statement has no effect [-Wunused-value] as==0; ~~^~~ main.cpp:27:23: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d",&n); ^ main.cpp:30:42: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d%d",&v[i].x,&v[i].y); ^