Array is not a string

In the C language we know that there is no string such data type, so in order to represent the string, we will generally use a char type array to represent, which leads to the beginning when we think the array and string when the same, in fact, the array is an array, string is a string;

Array is an alias of the fixed memory block size, which is a customizable memory size data type;

We know that strlen can figure out the number of data in a string, and sizeof can figure out the amount of memory the variable occupies.

　　

1#include <stdio.h>2#include <string.h>3#include <stdlib.h>4 5 voidMain ()6 {7     CharA[] = {'a','b','C','D','e'};//a one-dimensional array, not a string ending with ' /',8     CharA_1[] ="ABCDE";//string, allocated six byte space9 Tenprintf"sizeof (a):%d,strlen (a):%d\n",sizeof(a), strlen (a));//5 strlen (a) > sizeof (a) Oneprintf"A_1:%d,strlen (a_1):%d\n",sizeof(a_1), strlen (a_1));//6 5 Aprintf"a:%s\n", a);//without the ability to automatically end, will print out ABCDE and a bunch of garbled -printf"a_1:%s\n", a_1);//Print out ABCDE -  theSystem"Pause"); -}

From these lines of code we can find that the same is the import of a one-dimensional array Abcde,char a[] = {' A ', ' B ', ' C ', ' d ', ' E '} is an array, char a_1[] = "ABCDE", then what is the difference between an array and a string?

We can see: The number of data in the array is greater than the number of allocated space, strlen This function, the statistics of the number of character data encountered when null or ' s ' will stop, so that is, in-memory garbled will be considered to be deposited data;

However, the string will be implicitly written to a ' "", that is, the string terminator, so its length is 6, the length of the deposited data is 5;

So then someone would want to write char a[] = {' A ', ' B ', ' C ', ' d ', ' e ', ' n '}; plus a 0 it's good to see the words, but as we said earlier, there is no string in C syntax, in order to show that we usually use arrays to represent,

So the question is, may I ask 2.0000 = 2 Does this say that 2.0000 and 2 are the same? Of course not, although their values are equal. But one is a decimal, one is an integer, the types are different, although equality does not mean that they are the same data type;

Array is not a string