‌‌设n为的倍数，且‌voidfun(intn){‌inti，j，x，y;‌for(i=;i<=n;i++){‌if(*i<=n){‌for(j=*i;j<=n;j++){‌x++;‌y=*x+;‌}‌}‌‍}‌‍}‌ABCD