The interchange details of #define and typedef in C language _c language

Copy Code code as follows:

#include <stdio.h>
/*<---------#define String char *---->*/
typedef char * string;

int main (void)
{
String a[] = {"I", "like", "to", "Fight,"},
B[] = {"Pinch,", "and", "Bight."};
printf (%s%s%s%s%s\n ", A[0], a[1], a[2], a[3], b[0], b[1], b[2]);
return 0;
}

Replace the row of the TypeDef with #define, and the #define example that has been given cannot pass, but a single character can be added to the program.

==================== the answer to this question ===========================

What are the differences between the following two methods for defining PSTR data types? Which one is better?
typedef char* PSTR;
#define PSTR char*;

Answer and Analysis:

Generally speaking, a typedef is better than a #define, especially in a pointer situation. Take a look at the example:
typedef char* PSTR1;
#define PSTR2 char *
PSTR1 S1, S2;
PSTR2 S3, S4;

In the above variable definition, s1, S2, S3 are all defined as char *, and S4 is defined as char, not the pointer variable we expect, and the root cause is that #define is just a simple string replacement and the typedef is a new name for a type.
In the above example, the Define statement must be written as PStr2 S3, *s4; This can be done properly.

So the program

Copy Code code as follows:

#define String char *;
int main (void)
{
String a[] = {"I", "like", "to", "Fight,"},
*b[] = {"Pinch,", "and", "Bight."}; /*<--is here!! --*/
printf (%s%s%s%s%s\n ", A[0], a[1], a[2], a[3], b[0], b[1], b[2]);

return 0;
}

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Very ingenious indeed!