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  1. #include <stdio.h>
  2.  
  3.  
  4. double mul(double x, double y);
  5.  
  6. int main (void){
  7. double x;
  8. double y;
  9. double ans;
  10. double (*pm)(double x, double y);
  11. pm=mul;
  12. ans=(*pm)(x,y);
  13. printf("ans=%lf\n",ans);
  14. return 0;
  15. }
  16.  
  17. double mul(double x, double y){
  18. return x*y;
  19. }
  20.  
Success #stdin #stdout 0s 544KB
stdin
Standard input is empty
stdout
ans=0.000000