#include <stdio.h>int main(){??? double num = 2.5;????? //定義浮點(diǎn)型變量num并賦值為2.5??? printf("num的整數(shù)部分是%d\n", (int)num);? ??? return 0;}這個(gè)為什么錯(cuò)了#include <stdio.h>int main(){??? double num = 2.5; ??? int numone = (int)(num)//定義浮點(diǎn)型變量num并賦值為2.5??? printf("num的整數(shù)部分是%d\n", numone);? ??? return 0;}這個(gè)又為什么錯(cuò)了