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  1. #include <iostream>
  2. #include <cmath>
  3. #include <iomanip>
  4. #include <cstdlib>
  5. using namespace std;
  6.  
  7. void get_term(int&,int&);
  8. bool end_poly(int);
  9. void print_term(int,int,int&);
  10. double evaluate_term(int,int,int);
  11.  
  12. int main()
  13. {
  14.   int xvalue;
  15.   int coef, exponent;
  16.   double result;
  17.   int term_count;
  18.  
  19.   cout << fixed << setprecision(0);
  20.   cin >> xvalue;
  21.  
  22.   while (cin)
  23.     {
  24.       term_count = 0;
  25.       result = 0;
  26.       cout << "When x = " << xvalue << endl;
  27.       get_term(coef,exponent);
  28.       while (!end_poly(exponent))
  29. 	{
  30. 	  result = result + evaluate_term(coef,exponent,xvalue);
  31. 	  print_term(coef,exponent,term_count);
  32. 	  get_term(coef,exponent);
  33. 	}
  34.       cout << " = " << result << endl << endl;
  35.       cin >> xvalue;
  36.     }
  37.   return 0;
  38. }
  39.  
  40. void get_term(int& coefficient, int& exponent)
  41. {
  42.   cin >> coefficient >> exponent;
  43.   return;
  44. }
  45.  
  46. bool end_poly(int exponent)
  47. {
  48. 	if(exponent >= 0)
  49. 		{
  50. 			return false;
  51. 		}
  52. 	else
  53. 		{
  54. 			return true;
  55. 		}
  56. }
  57.  
  58. void print_term(int coef, int exp, int& term_count)
  59. {
  60. 	if(coef < 0)
  61. 		{
  62. 			cout << "- ";
  63. 			coef = abs(coef);
  64. 		}
  65. 	if(term_count > 0)
  66. 		{
  67. 			if(coef != 0)
  68. 				{
  69. 					cout << "+ ";
  70. 				}
  71. 		}
  72. 	if(coef > 1)
  73. 		{
  74. 			cout << coef;
  75. 		}
  76. 	if((coef > 1 || coef == 1) && exp > 1)
  77. 		{
  78. 			cout << "x^" << exp << " ";
  79. 		}
  80. 	if((coef > 1 || coef ==1) && exp ==1)
  81. 		{
  82. 			cout << "x ";
  83. 		}
  84. 	if(coef == 1 && exp == 0)
  85. 		{
  86. 			cout << coef << " ";
  87. 		}	
  88. 	term_count++;
  89. }
  90.  
  91. double evaluate_term(int coef, int exponent, int x)
  92. {
  93. 	return (pow(x,exponent) * coef);
  94. }
  95.  
Success #stdin #stdout 0.01s 5308KB
comments (?)
stdin 
1
2
stdout 
When x = 1
 = 0
https://ideone.com/473bhG
language:
C++14 (gcc 8.3)
created:
1 day ago
visibility:
public

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