代碼如下我的問題是為什么輸出結果是mistakesdafa-842150451而不是sdafamistakea[0]為什么先輸出mistake然后在sdafa后返回了a[0]而不是先輸出sdafa后輸出mistake 和a[0]#include<iostream>
#include<cmath>
using?namespace?std;
class?arr{
public:
arr(int?s?=?0);
~arr();
int?&?operator[](int?i);
private:
int?*p;
int?size;
};
arr::arr(int?s){
size?=?s;
if?(size?==?0){
p?=?NULL;
}
else
p?=?new?int[size?+?1];
for?(int?i?=?1;?i?<=?size;?i++)
p[i]?=?0;
}
arr::~arr(){
if?(!p)
delete[]?p;
}
int&?arr::operator[](int?i){
if?(i<1?||?i>size){
cout?<<?"mistake"?<<?endl;
return?p[0];
}
return?p[i];
}
int?main(){
arr?a(5);
cout?<<?"sdafa"?<<?a[9]?<<?endl;
}
C++輸出順序的問題
慕粉18341035298
2017-03-27 22:23:38
