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c语言中求字符串的长度的函数_c语言求最大字符串

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c语言中求字符串的长度的函数_c语言求最大字符串在C语言中求字符串的长度，可以使用sizeof()函数和strlen()函数，后者需要引入string.h(#include<string.h>)因为C语言字符串是以\0结尾表示

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在C语言中求字符串的长度，可以使用sizeof()函数和strlen()函数，后者需要引入string.h (#include <string.h>)

因为C语言字符串是以 \0 结尾表示结束的，如：

char str1[] = {‘h’,’e’,’l’,’l’,’o’,’\0′};

使用sizeof(str1) 结果为：6，因为包括 \0;

使用strln(str1)结果为：5，不包括 \0, 所以只求字符串中内容的长度，就使用strlen()函数

  另：

 sizeof()函数，既可以用来计算变量的长度，也可以用来计算类型的所占的字节数：

 sizeof(str1), 求变量长度，结果为6；

 sizeof(int), 求整型所在的字节数，结果为4。

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