在 C 中连接 char 数组

Question

我有一个字符数组:

char* name = "hello";

我想为该名称添加一个扩展名

hello.txt

我该怎么做？

name += ".txt" 不起作用

Answer 1

看看 strcat功能。

特别是，你可以试试这个:

const char* name = "hello";
const char* extension = ".txt";

char* name_with_extension;
name_with_extension = malloc(strlen(name)+1+4); /* make space for the new string (should check the return value ...) */
strcpy(name_with_extension, name); /* copy name into the new var */
strcat(name_with_extension, extension); /* add the extension */
...
free(name_with_extension);