Compilare: main.c: In function 'main': main.c:8:18: warning: format '%lf' expects argument of type 'double *', but argument 2 has type 'long double *' [-Wformat=] scanf("%lf%lf",x+i,y+i); ^ main.c:8:21: warning: format '%lf' expects argument of type 'double *', but argument 3 has type 'long double *' [-Wformat=] scanf("%lf%lf",x+i,y+i); ^ main.c:6:5: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("aria.in","r",stdin),freopen("aria.out","w",stdout),scanf("%hd",&n); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:6:34: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("aria.in","r",stdin),freopen("aria.out","w",stdout),scanf("%hd",&n); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:6:65: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] freopen("aria.in","r",stdin),freopen("aria.out","w",stdout),scanf("%hd",&n); ^~~~~~~~~~~~~~~ main.c:8:9: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] scanf("%lf%lf",x+i,y+i); ^~~~~~~~~~~~~~~~~~~~~~~