How to change the output method (to save the printf output to TXT text)

Check out the relevant information, summarized as follows:

1 #include <stdio.h>
 2 #include <stdlib.h>
 3  
4  int main()
 5  {
 6      char money= ' s ' ;
 7      char a = ' w ' ;
 8      char b = ' e ' ;
 9      char day= ' t ' ;
 10      
11      FILE *fp = fopen( " a.txt " , " a+ " ); // Open and create a write-only file at the specified location.
12          /* 
13              FILE *fp = fopen("path","write mode");
 14              "w" => create and write (overwrite)
 15              "a" => create and write (continuous write)
 16              "a+" => create and write (line-by-line write)
 17  */ 
18      
19          fprintf(fp, " %c,%c,%c,%c,%c\n " ,money,a ,b,b,day); // Use fprintf to change the output port to document 
20          fclose(fp); // Close the specified file 
21      
22      return  0 ;
 23 }

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