C中常用方法总结

1. 计算字符串长度

#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>

#define uint16_t int
uint16_t xstrlen(const char *s)
{
	int n;
	for(n = 0; *s != '\0'; s++)
	{
		n++;
	}
	return n;
}


int main(){		
	const char *str = "Hello,World!";
	uint16_t len = xstrlen(str);	
	printf("值：%d\n",len);	
	return 0;
}