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  1. #include<stdio.h>
  2.  
  3. void swap(int a, int b)
  4. {
  5.    int tmp;
  6.  
  7.    tmp = a;
  8.    a = b;
  9.    b = tmp;
  10.  
  11.    printf("In the swap function, A = %d; B = %d\n", a, b);
  12. }
  13.  
  14. void swap2(int *a, int *b)
  15. {
  16.    int tmp;
  17.    tmp = *a;
  18.    *a = *b;
  19.    *b = tmp;
  20. }
  21.  
  22.  
  23. int main()
  24. {
  25.    int x = 10;
  26.    int y = 20;
  27.  
  28.    printf("X = %d; Y = %d\n", x, y);
  29.    swap(x,y);
  30.    printf("X = %d; Y = %d\n", x, y);
  31.    swap2(&x,&y);
  32.    printf("X = %d; Y = %d\n", x, y);
  33. }
  34.  
Success #stdin #stdout 0s 5304KB
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stdin
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Standard input is empty
stdout
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X = 10; Y = 20
In the swap function, A = 20; B = 10
X = 10; Y = 20
X = 20; Y = 10
https://ideone.com/SZzxFi
language:
C (gcc 8.3)
created:
30 days ago
visibility:
public

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