#include<stdio.h>
#include<string.h>
#include<graphics.h>
int main()
{
char buf[] = "hello";
int len = strlen(buf);
printf("%d", len);
printf("%d", sizeof(buf));
char buf2[] = "\0hello";//strlen从首元素到结束符
int len2 = strlen(buf2);
printf("%d", len2);
printf("%d", sizeof(buf2));//sizeof()测试数据类型,不会因为\0而结束
char str[100] = "mile";
printf("%d", sizeof(str));//4
printf("%d", strlen(str));//100
}