Derivative Calculator Source Code

Simple Derivative Solver :-

1. #include "stdafx.h"   // Header file usually use in MS-VS
2. #include <iostream>  // Input / Output stream header file some IDE use <iostream.h>
3. #include <conio.h>    // for basic console operation
4. 
   
5. using namespace std;   /* Namespaces are like drawers in a filing cabinet. All of the standard library is in one drawer, and the only way to get to the stuff in that drawer is to tell C++ where to find it. You do that by prefixing the name with std:*/
6. 
   
7. int main ()
8. {
9. cout << "\tHi! This Program can solve simplist derivative Questions." << endl ;
10. cout << "\t\tThis program have a lot of limitation." << endl ;
11. cout << "\t\t\tThis is just for practice." << endl ;
12. cout << "\t\t\t\tMian Huzaifa" << endl ;
13. 
    
14. 
    
15. while (true) {            // Loop for calling the program continuously. 
16. char input[1024] ;     // Input from user as a character variable.
17. int input1 = 0 ;         // This variable stores the integer value of a Q. like 4x^2 
18. char variable = ' ' ;   // This variable stores the variable of a Q. as a character. like 4x^2 
19. int power = 0 ;        // This variable stores the power of a Q. as a integer. like 4x^2
20. int index = 0 ;      // variable use under in switch statment .
21. int multi = 1 ;         // 
22. cout << ">>> " ;     // Input prompt 
23. cin >> input ;          // Get input from user.
24. for (int i = 1 ; i <= 1023 ; i ++)  //Converting all character values in its real data type
25. {
27. switch (input[index])
28. {
29. case '1' :
30. input1 = input1 * multi ;
31. input1 = input1 + 1 ;
32. break ;
33. case '2' :
34. input1 = input1 * multi ;
35. input1 = input1 + 2 ;
36. break ;
37. case '3' :
38. input1 = input1 * multi ;
39. input1 = input1 + 3 ;
40. break ;
41. case '4' :
42. input1 = input1 * multi ;
43. input1 = input1 + 4 ;
44. break ;
45. case '5' :
46. input1 = input1 * multi ;
47. input1 = input1 + 5 ;
48. break ;
49. case '6' :
50. input1 = input1 * multi ;
51. input1 = input1 + 6 ;
52. break ;
53. case '7' :
54. input1 = input1 * multi ;
55. input1 = input1 + 7 ;
56. break ;
57. case '8' :
58. input1 = input1 * multi ;
59. input1 = input1 + 8 ;
60. break ;
61. case '9' :
62. input1 = input1 * multi ;
63. input1 = input1 + 9 ;
64. break ;
65. case '0' :
66. input1 = input1 * multi ;
67. input1 = input1 + 0 ;
68. break ;
69. case 'x' :
70. variable = 'x' ;
71. break ;
72. case '^' :
73. {
74. switch (input[index + 1])
75. {
76. case '1' :
77. power = power + 1 ;
78. index = index + 1 ;
79. break ;
80. case '2' :
81. power = power + 2 ;
82. index = index + 1 ;
83. break ;
84. case '3' :
85. power = power + 3 ;
86. index = index + 1 ;
87. break ;
88. case '4' :
89. power = power + 4 ;
90. index = index + 1 ;
91. break ;
92. case '5' :
93. power = power + 5 ;
94. index = index + 1 ;
95. break ;
96. case '6' :
97. power = power + 6 ;
98. index = index + 1 ;
99. break ;
100. case '7' :
101. power = power + 7 ;
102. index = index + 1 ;
103. break ;
104. case '8' :
105. power = power + 8 ;
106. index = index + 1 ;
107. break ;
108. case '9' :
109. power = power + 9 ;
110. index = index + 1 ;
111. break ;
112. case '0' :
113. power = power  - 1 ;
114. index = index + 1 ;
115. break ;
116. default :
117. index = index + 1 ;
118. break ;
119. }
120. }
121. default :
122. break ;
123. }
124. index += 1 ;
125. if (i < 2)
126. multi = multi * 10 ;
127. 
     
128. }
129. if (variable == ' ')
130. cout << 0 ;
131. 
     
132. else if (input1 != 0 & input1 != -1 & variable != ' ' & power == 0)
133. cout << input1 ;
134. 
     
135. else if (input1 == 0 & variable != ' ' & power == 0)
136. cout << 1 ;
137. 
     
138. else if (input1 == 0 & variable != ' ' & power != 0 & power != -1 )
139. cout << power << variable << "^" << power - 1 ;
140. 
     
141. else if (input1 != 0 & input1 != -1 & variable != ' ' & power != 0 & power != -1)
142. cout << power * input1 << variable << "^" <<  power - 1 ;
143. 
     
144. else if (input1 == -1 & variable != ' ' & power != 0 & power != -1)
145. cout << '0' << variable << "^" <<  power - 1 ;
146. 
     
147. else if (input1 != 0 & variable != ' ' & power == -1)
148. cout << 0 ;
149. 
     
150. else if (input1 == 0 & variable != ' ' & power == -1)
151. cout << 0 ;
152. else if (input1 == -1)
153. cout << 0 ;
154. 
     
155. cout << endl ;
156. }
157. 
     
158. return 0 ;
159. }