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  1. #include <iostream>
  2. #include <cmath>
  3. using namespace std;
  4.  
  5. void findRoot(double val, double &res1, double &res2, double &res3) {
  6. 	if (val < 0) {
  7. 		res1 = res2 = res3 = -1;
  8. 		return;
  9. 	}	
  10. 	res1 = pow(val, 1.0/2);
  11. 	res2 = pow(val, 1.0/3);
  12. 	res3 = pow(val, 1.0/4);
  13. }
  14.  
  15. void task1()
  16. {
  17. 	double val;
  18. 	double res1, res2, res3;
  19. 	cout << "Input val:" << endl;
  20. 	cin >> val;
  21.  
  22. 	findRoot(val, res1, res2, res3);
  23. 	cout << val << " " << res1 << " " << res2 << " " << res3 << endl;	
  24. }
  25.  
  26. int main() {
  27.  
  28. 	//task choose here
  29. 	int i;
  30. 	do
  31. 	{
  32. 		cout << "Input task number (1-5):" << endl;
  33. 		cin >> i;
  34. 		switch(i)
  35. 		{
  36. 			case 1: 
  37. 				task1();
  38. 			break;
  39. 			case 2: 
  40. 				//task2();
  41. 			break;
  42. 			case 3: 
  43. 				//task3();
  44. 			break;
  45. 			case 0:
  46. 				cout << "Program is done" << endl;
  47. 			break;
  48. 			//etc
  49. 			default:
  50. 				cout << "Invalid option" << endl;
  51. 		}
  52. 	}
  53. 	while(i != 0);
  54.  
  55. 	return 0;
  56. }
Success #stdin #stdout 0s 3476KB
comments (?)
stdin
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1 16 0
stdout
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Input task number (1-5):
Input val:
16 4 2.51984 2
Input task number (1-5):
Program is done
https://ideone.com/2YO3H6
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
public

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