C语言: Change the contents of a string array

Question

我在更改保存字符串的变量的内容时遇到问题。与 int 相比，我可能过于字面地考虑了这一点，而不是作为数组。也许必须先刷新数组？非常感谢。

// declare with maximum size expected +1 (for terminator 0)
char myString1[20] = "Hello"; //declare and assign one line - OK
myString1[20] = "Hello Longer"; // change contents - fails
myString1[] = "Hello Longer"; // change contents - fails
myString1 = "Hello Longer"; // change contents - fails

Answer 1

这是 C，而不是负责为您复制字符串的面向对象语言。您需要使用string 库。例如:

char myString1[20] = "Hello";
strncpy(myString1, "Hello Longer", 20);