Thread: Password problem

I am stuck on this program. I have to get 3 numbers as strings;convert them to integers,reverse there order,then use tokenization to separate them. I can't seem to get the numbers reversed to begin qwith. Any help would be great! Thanks!

Code:

#include <stdio.h>
#include<string.h>
#include<stdlib.h>


int convertNum ( const char *);

main()

{
  char myString[10];
  char myString2[10];
  char myString3[10];
  char myStringfull[80];
  int x;

void reverse (const char * const);

  printf("Enter a three digit number:\n ");
  scanf("%s",&myString);
  printf("Enter another three digit number:\n");
  scanf("%s",&myString2);
  printf("Enter one more number:\n");
  scanf("%s",&myString3);

strcpy(myStringfull,myString);
strcpy(myStringfull,myString2);
strcpy(myStringfull,myString3);

x=convertNum(myStringfull);


  return 0;

}
int convertNum (const char * myStringfull)
{
	int y;
	reverse(myStringfull);

	y= atoi(myStringfull);

	

	return y;
}

void reverse (const char * const sPtr)
{
	if (sPtr[0] == '\0')
		return;
	else 
	{
		reverse(&sPtr[1]);
		putchar(sPtr[0]);
	}
}

[code][/code]tagged by Salem

in your reverse function it A) doesn't make sense B) won't work because your string is a constant and you can't edit constants.

Now, maybe you should try to work out how to reverse a string on paper before you start coding, and then your functions may make some sense.

Code:

strcpy(myStringfull,myString);
strcpy(myStringfull,myString2);
strcpy(myStringfull,myString3);

If you want top copy ALL strings into myStringfull, you need to use the strcat function on myString2 and myString3 to append the string to myStringfull.