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  1. #include<stdio.h>
  2. double power(double x, int n);
  3. double multiply(double x, int n);
  4. double divide(double x, int n);
  5. typedef double (*use)(double, int);
  6. double powerpower(use s, double x, int n, int m);
  7. int main(){
  8. 	double x;
  9. 	int n,m;
  10.  
  11. 	scanf("%lf %d %d",&x,&n,&m);
  12.  
  13.     use fn = power;
  14. 	printf("%f\n",powerpower(fn, x, n, m));
  15.  
  16.     fn = multiply;
  17. 	printf("%f\n",powerpower(fn, x, n, m));
  18.  
  19.     fn = divide;
  20. 	printf("%f",powerpower(fn, x, n, m));
  21. } 
  22.  
  23. double power(double x, int n){
  24. 	if(n==1){
  25. 		return x;
  26. 	}
  27. 	else{
  28. 		return (x*power(x,n-1));
  29. 	}
  30. }
  31.  
  32. double multiply(double x, int n){
  33. 	return (x*n);
  34. }
  35.  
  36. double divide(double x, int n){
  37. 	return (x/n);
  38. }
  39.  
  40. double powerpower(use s, double x, int n, int m){
  41. 	double i=(*s)(x,n);
  42. 	if(m==1){
  43. 		return i;
  44. 	} 
  45. 	else{
  46. 		double j= power(i,m);
  47. 		return j;
  48. 	}
  49.  
  50. }
Success #stdin #stdout 0s 2172KB
comments (?)
stdin 
1.2 2 2
stdout 
2.073600
5.760000
0.360000
https://ideone.com/sdb6sN
language:
C (gcc 8.3)
created:
7 years ago
visibility:
public

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