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  1. #include <stdio.h>
  2. #define SWAP(a,b,c) c t;t=a;a=b;b=t;
  3.  
  4. int main(void)
  5. {
  6.    int x=10,y=20;
  7.    printf("Before swapping\n");
  8.    printf("%d %d\n",x,y);
  9.    SWAP(x,y,int);
  10.    printf("After swapping\n");
  11.    printf("%d %d\n",x,y);
  12. }
  13.  
Runtime error #stdin #stdout 0s 2292KB
comments (?)
stdin 
Standard input is empty
stdout 
Before swapping
10 20
After swapping
20 10
https://ideone.com/Bsfn9I
language:
C (gcc 8.3)
created:
10 years ago
visibility:
secret

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