（c语言版）strlen和sizeof的区别

#include<stdio.h>
#include<string.h>
void Fun(char str[100]){
    printf("7:%d ",sizeof(str)); 
    printf("8:%d ", strlen(str));
    char *p=str;
    printf("9:%d ",sizeof(p));   
    printf("10:%d ", strlen(p));
    printf("11:%d ",sizeof(*p));
    printf("12:%d ", strlen(*p));
}
int main(){
    char str[100]={"a\101\08abc"};
    printf("1:%d ",sizeof(str));   //开辟的字节数为100
    printf("2:%d ",strlen(str));   //遇到第一个\0结束，输出2
    printf("3:%d ",sizeof("a\101\08abc")); //输出8，会计算字符串结尾的\0
    printf("4:%d ", strlen("a\101\08abc")); //遇到\0结束，且不计算\0所占字节
    char *p=str;
    printf("5:%d ",sizeof(p));        
    printf("6:%d ", strlen((p)));
    Fun(str);
}

输出结果：

1:100 2:2 3:8 4:2 5:8 6:2 7:8 8:2 9:8 10:2 11:1

#include<stdio.h>
#include<string.h>
int main(){
    char str[100]={65,0,'a','b','c'};
    printf("%s",str);
    return 0;
}

输出结果：

A