Thread: swapping help

  1. 03-24-2010 #1
    mouse666666
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    swapping help

    i want to swap the cotent of x and y how would i do that in pointer

    Code:
    #include<stdio.h>
#include<conio.h>
#include<stdlib.h>

main()
{     
  int x=3;
  int y=4;
  int *ptr1=&x;
  int *ptr2=&y;
  int temp;

  temp=*ptr1;
  *ptr1=*ptr2;
  *ptr2=temp;
  
  printf("x is %i y is %i ",ptr1,ptr2);
  
  
  getch();
  
}
  2. 03-24-2010 #2
    laserlight
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    You appear to be doing the swapping correct. You just need to print x and y.
    Quote Originally Posted by Bjarne Stroustrup (2000-10-14)
    I get maybe two dozen requests for help with some sort of programming or design problem every day. Most have more sense than to send me hundreds of lines of code. If they do, I ask them to find the smallest example that exhibits the problem and send me that. Mostly, they then find the error themselves. "Finding the smallest program that demonstrates the error" is a powerful debugging tool.
    Look up a C++ Reference and learn How To Ask Questions The Smart Way
  3. 03-24-2010 #3
    mouse666666
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    what is wrong with my print statement
  4. 03-24-2010 #4
    laserlight
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    You are printing the pointers, not what they point to, yet what you want to print is what they point to, i.e., x and y.
    Quote Originally Posted by Bjarne Stroustrup (2000-10-14)
    I get maybe two dozen requests for help with some sort of programming or design problem every day. Most have more sense than to send me hundreds of lines of code. If they do, I ask them to find the smallest example that exhibits the problem and send me that. Mostly, they then find the error themselves. "Finding the smallest program that demonstrates the error" is a powerful debugging tool.
    Look up a C++ Reference and learn How To Ask Questions The Smart Way
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