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  1. #include <stdio.h>
  2.  
  3. void swap(int *x, int *y){
  4. int tmp = *y;
  5. *y = *x;
  6. *x = tmp;
  7. }
  8.  
  9. int main() {
  10. int x = 100;
  11. int y = 200;
  12.  
  13. swap(&x,&y);
  14. printf("x=%d, y=%d\n", x, y);
  15.  
  16. return 0;
  17. }
  18.  
Success #stdin #stdout 0s 5292KB
stdin
Standard input is empty
stdout
x=200,  y=100