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  1. #include <stdio.h>
  2. int fib_next(int *a, int *b) {
  3. int _a = *a;*a = *b;*b = _a + *b;
  4. return _a;
  5. }
  6. int main() {
  7. int i, a = 0, b = 1;
  8. for (i = 0; i < 10; i++)
  9. printf("%d ", fib_next(&a, &b));
  10. return 0;
  11. }
  12.  
Success #stdin #stdout 0s 9424KB
stdin
Standard input is empty
stdout
0 1 1 2 3 5 8 13 21 34