think array in c

In fact,we should class many scene.

String is a array of char.As we all know,when you create a string or array of char.C will self-acting add a char(“ ”) to the end.So,when you create a array which length is 6.Finally,it length is 7.

Now we use this to get length.

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void getLength(char* a){
	int i = 0;
	if(a == NULL){
		return;
	}
	while(a[i] != '