c++ 函數內定義變數返回

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測試代碼：

#include<bits/stdc++.h>using namespace std;char * fun() {    char s[] = "abcde";    printf("fun:%p\n",s);    return s;}char * fun1() {    static char s[] = "abcde";    printf("fun1:%p\n",s);    return s;}char * fun2() {    char *s = new char[6];    strcpy(s,"abcde");    printf("fun2:%p\n",s);    return s;}int main() {    printf("%p %s\n",fun(),fun());    printf("%p %s\n",fun1(),fun1());    printf("%p %s\n",fun2(),fun2());    return 0;}

運行結果：

fun:0x7ffdba452540fun:0x7ffdba452540(nil) (null)fun1:0x601060fun1:0x6010600x601060 abcdefun2:0x1fd3030fun2:0x1fd30500x1fd3050 abcde

 

c++ 函數內定義變數返回