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  1.  
  2. #include<iostream>
  3. #include<stdio.h>
  4. #include<conio.h>
  5. #include<stdlib.h>
  6. #include<string.h>
  7. using namespace std;
  8.  
  9. int main()
  10. {
  11. 	char tmp[15];
  12. 	char str[15], csf[15] = { "E" };
  13. 	int ssm = 0, i, j, v, k, pos = 0, a;
  14.  
  15.  
  16. 	char pt[6][5][4] = { "" , "i" , "+" , "*" , "/",
  17. 		"E", "TX", "n" , "n" , "n",
  18. 		"X", "n" , "TX", "n" , "" ,
  19. 		"T", "VY", "n" , "n" , "n",
  20. 		"Y", "n" , ""  , "VY", "" ,
  21. 		"V", "i" , "n" , "n" , "n" };
  22. 	cout << "\n Enter An Expression: " << endl;
  23. 	cin >> str;
  24.  
  25. 	while (str[ssm] != '/')
  26. 	{
  27. 		pos = 0;
  28. 		while (csf[pos] != 'E' &&
  29. 			csf[pos] != 'X' &&
  30. 			csf[pos] != 'T' &&
  31. 			csf[pos] != 'Y' &&
  32. 			csf[pos] != 'V' && csf[pos] != '\0')
  33. 			pos++;
  34. 		if (csf[pos] == '\0')
  35. 			break;
  36.  
  37. 		for (i = 1; i<6; i++)
  38. 		{
  39. 			if (csf[pos] == pt[i][0][0])
  40. 				break;
  41. 		}
  42. 		for (j = 1; j<5; j++)
  43. 		{
  44. 			if (str[ssm] == pt[0][j][0])
  45. 				break;
  46. 		}
  47. 		if (strcmp(pt[i][j], "n") == 0)
  48. 		{
  49. 			cout << "\n Null Value: " << endl;
  50. 			cout << pt[i][j];
  51. 			exit(0);
  52. 		}
  53.  
  54. 		for (k = 0; k<pos; k++)
  55. 			tmp[k] = csf[k];
  56. 		tmp[k] = '\0';
  57. 		strcat_s(tmp, pt[i][j]);
  58.  
  59. 		int l = strlen(tmp);
  60. 		k = l;
  61.  
  62. 		for (a = pos + 1; csf[a] != '\0'; a++, k++)
  63. 			tmp[k] = csf[a];
  64. 		strcpy_s(csf, tmp);
  65. 	}
  66.  
  67.  
  68. 	strcat_s(csf, "/");
  69. 	if (strcmp(csf, str) == 0)
  70. 	{
  71. 		cout << "\t csf" << csf;
  72.  
  73. 		cout << "\tstr" << str;
  74.  
  75. 		cout << "\n Valid Expression: " << endl;
  76.  
  77.  
  78. 	}
  79.  
  80. 	else
  81. 	{
  82. 		cout << "\n Invalid Expression:" << endl;
  83.  
  84. 	}
  85.  
  86.  
  87. 	_getch();
  88. 	return 0;
  89. }
Compilation error #stdin compilation error #stdout 0s 0KB
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stdin
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Standard input is empty
compilation info 
prog.cpp:4:18: fatal error: conio.h: No such file or directory
 #include<conio.h>
                  ^
compilation terminated.
stdout
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Standard output is empty
https://ideone.com/EDK33u
language:
C++ (gcc 8.3)
created:
6 years ago
visibility:
public

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