-
Notifications
You must be signed in to change notification settings - Fork 34
/
GroupD_Practical26(C++).cpp
100 lines (87 loc) · 1.7 KB
/
GroupD_Practical26(C++).cpp
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
/*
In any language program mostly syntax error occurs due to unbalancing delimiter such as
(),{},[]. Write C++ program using stack to check whether given expression is well parenthesized or not.
*/
#include <iostream>
using namespace std;
#define size 10
class stackexp
{
int top;
char stk[size];
public:
stackexp()
{
top=-1;
}
void push(char);
char pop();
int isfull();
int isempty();
};
void stackexp::push(char x)
{
top=top+1;
stk[top]=x;
}
char stackexp::pop()
{
char s;
s=stk[top];
top=top-1;
return s;
}
int stackexp::isfull()
{
if(top==size)
return 1;
else
return 0;
}
int stackexp::isempty()
{
if(top==-1)
return 1;
else
return 0;
}
int main()
{
stackexp s1;
char exp[20],ch;
int i=0;
cout << "\n\t!! Parenthesis Checker..!!!!" << endl; // prints !!!Hello World!!!
cout<<"\nEnter the expression to check whether it is in well form or not : ";
cin>>exp;
if((exp[0]==')')||(exp[0]==']')||(exp[0]=='}'))
{
cout<<"\n Invalid Expression.....\n";
return 0;
}
else
{
while(exp[i]!='\0')
{
ch=exp[i];
switch(ch)
{
case '(':s1.push(ch);break;
case '[':s1.push(ch);break;
case '{':s1.push(ch);break;
case ')':s1.pop();break;
case ']':s1.pop();break;
case '}':s1.pop();break;
}
i=i+1;
}
}
if(s1.isempty())
{
cout<<"\nExpression is well parenthesised...\n";
}
else
{
cout<<"\nSorry !!! Invalid Expression or not in well parenthesized....\n";
}
return 0;
}