sizeof与strlen的区别?

sizeof是运算符，strlen是函数，并且只能用char*做参数，且必须是以'/0'结尾!

1:

char ss[]="0123456789";

sizeof(ss)=11

sizeof(*ss)=1

strlen(ss)=10

2:

char *ss="0123456789";

sizeof(ss)=4

sizeof(*ss)=1

strlen(ss)=10

3:

char ss[100]="0123456789";

sizeof(ss)=100

sizeof(*ss)=1

strlen(ss)=10

4:

char ss[100]={'h','e','l','l','o'};

sizeof(ss)=100

sizeof(*ss)=1

strlen(ss)=5

5:

char ss[100]={'h','e','l','l','o','/0','c','+','+'};

sizeof(ss)=100

sizeof(*ss)=1

strlen(ss)=5

6:

void Func(char str[100])

{

  sizeof(str)=4

}