convert double to string to double

[magic]

Is there a preset library to
convert from double to string and
convert from string to double

[Stefan Pendl]

You would use sprintf to convert from a number to a string and any of the ato... or strto... functions to convert from string to number.

[magic]

could you give me sample how to  use sprintf(). The documentation is quite difficult for me to understand without sample.
Say, I want to convert a double number into a string.:

Code: [Select]

        double myDOUBLE=123.456;
char* mySTRING=GlobalAlloc(GMEM_FIXED,64);     //alocate string in memory
_strnset(mySTRING,0,1);                                   //initilize mySTRINGto ""
int sprintf(testing,myDOUBLE%???);                     //I can't really understand how to format it


[Robert]

Here are two examples

 Example 1

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#include <windows.h>
#include <stdio.h>

int main(void) {
  double myDOUBLE=123.456;
  char* mySTRING=GlobalAlloc(GMEM_FIXED,64);     //allocate string in memory
  _strnset(mySTRING,0,1);                        //initilize mySTRINGto ""
  int i;
 
  i = sprintf(mySTRING, "%G", myDOUBLE);
  printf("123.456 as a string is %s\n", mySTRING);
  printf("sprintf returns: %d\n\n", i);

  return 0;
}


 Example 2

Code: [Select]


#include <stdio.h>

int main(void) {
  double dub1 = 123.456;
  char str1[10];
  int i;
 
  i = sprintf(str1, "%G", dub1);
  printf("123.456 as a string is %s\n", str1);
  printf("sprintf returns: %d\n\n", i);

  return 0;
}


I hope this helps.

Robert Wishlaw