返回的字符串值变成垃圾 [英] Returned string value becomes garbage

问题描述

我试图将字符 array 值传递给字符 pointer.然后这个值被返回给调用它的方法，但是在它被返回之后，这个值就变成了垃圾.谁能帮帮我?

Im trying to pass a character array value to a character pointer. then this value gets returned to a method that is calling it, but after it gets returned, the value becomes garbage. can anyone help me?

#include <stdio.h>

const char * getname(){
     char nam[10];
     char * name;
     gets(nam);
     name = nam;
     return name;
}
main(){
       printf("%s",getname());
       getch();
}

一切都很好，直到字符串被返回

everything is fine, until the string gets returned

推荐答案

nam的作用域是getname()函数的局部，你通过nam地址>名称指针

Scope of nam is local to function getname(), you are returning nam address through name pointer

const char * getname(){
     char nam[10];
     :
     name = nam;
     return name;
}

为 nam; 动态分配内存.喜欢:

allocate memory for nam; dynamically. like:

nam = malloc(sizeof(char)*10);

另外可能有bufferoverun不要使用gets()，喜欢:

additionally there may be bufferoverun don't use gets(), do like:

nam = malloc(sizeof(char)*10);
fgets( nam, 10, stdin ); 

你也不需要使用 name 一个额外的变量简单的 return nam 很好.

You also not need to use name an extra variable simple return nam is good.

const char * getname(){
     char * nam = malloc(sizeof(char)*10);
     fgets( nam, 10, stdin ); 
     return nam;
}

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