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  1. #include <stdio.h>
  2.  
  3. void swap(long *a,long *b){
  4.   *a=(*a<<sizeof(*a)*4);
  5.   *a+=*b;
  6.   *b=*a ^ *b;
  7.   *b=(*b>>sizeof(*a)*4);
  8.   *a=(*a<<sizeof(*a)*4);
  9.   *a=(*a>>sizeof(*a)*4);
  10. }
  11.  
  12. int main(){
  13.  long a=0x12345678;
  14.  long b=0x9ABCDEF0;
  15.    printf("a=%lx b=%lx\n",a,b);
  16.  swap(&a,&b);
  17.   printf("a=%lx b=%lx\n",a,b);
  18. }
Runtime error #stdin #stdout 0.01s 1676KB
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stdin
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Standard input is empty
stdout
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a=12345678 b=9abcdef0
a=ffffdef0 b=6b88
https://ideone.com/eCVss
language:
C (gcc 8.3)
created:
13 years ago
visibility:
public

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