Compilare: main.cpp: In function 'int main()': main.cpp:40:28: warning: unused variable 't1' [-Wunused-variable] double l,d,xm,ym,x,y,t,t1; ^~ main.cpp:41:24: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%lld",&n); ^ main.cpp:43:43: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%lf%lf",&v[i].x,&v[i].y); ^