#include <stdio.h>
#include<string.h>

int main() {

	char greeting[7] = { 'h','e','l','l','o','\0' };
	char *str = "helloaf;af;";
	printf("%s\n",greeting);
	printf("%d\n", sizeof(greeting));//7
	printf("%d\n",strlen(greeting));//5
	printf("%s\n",str);
	printf("%d\n",sizeof(str));//4

	char str1[12] = "hello";
	char str2[12] = "world";
	char str3[12];
	int len;
	int cmp;

	//比较
	cmp = strcmp(str1, str2);
	printf("strcmp(str1,str2):%d\n",cmp);

	//复制str1到str3
	strcpy(str3,str1);
	printf("strcpy(str3,st1):%s\n",str3);

	//连接str1和str2
	strcat(str1,str2);
	printf("strcat(str1,str2):%s\n",str1);

	//计算长度
	len = strlen(str1);
	printf("strlen(str1):%d\n",strlen(str1));

	return 0;
}