c语言：更改字符串数组的内容 [英] C Language: Change the contents of a string array

问题描述

我无法改变一个变量保存一个字符串的内容。我可能这种思维文生义相对于一个int，而不是一个数组。也许必须先冲洗阵列？
不胜感谢。

  //最大规模预计申报+1（用于终止0）
焦炭myString1 [20] =你好; //声明并分配一个行 - 确定
myString1 [20] =你好长; //改变内容 - 失败
myString1 [] =你好长; //改变内容 - 失败
myString1 =你好长; //改变内容 - 失败
 

解决方案

这是C，而不是面向对象的语言，需要复制的字符串为你的照顾。你需要使用字符串库。例如：

 字符myString1 [20] =你好;
函数strncpy（myString1，你好更长，20）;
 

I'm having trouble changing the contents of a variable holding a string. I'm probably thinking of this too literally compared to an int and not as an array. Maybe have to flush array first? Much thanks.

// 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

解决方案

This is C, not an object oriented language that takes care of copying strings for you. You'll need to use the string library. For example:

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

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