diff --git a/assignment-26.cpp b/assignment-26.cpp
new file mode 100644
index 0000000..1c40821
--- /dev/null
+++ b/assignment-26.cpp
@@ -0,0 +1,192 @@
+#include<iostream>
+using namespace std;
+
+class stack1
+{
+    int top;
+    char stack2[100];
+    char infix[100];
+public:
+    stack1()
+    {
+        top = -1;
+    }
+    void infix1();
+    void check();
+    int check1(char tkn);
+    void push(int x);
+    int pop();
+    bool isEmpty();
+    bool isFull();
+    void display();
+};
+
+bool stack1::isEmpty()
+{
+    if(top == -1)
+    {
+        return true;
+    }
+    else
+    {
+        return false;
+    }
+}
+
+bool stack1::isFull()
+{
+    if(top == 100 - 1)
+    {
+        return true;
+    }
+    else
+    {
+        return false;
+    }
+}
+
+void stack1::push(int x)
+{
+    if(!isFull())
+    {
+        top++;
+        stack2[top] = x;
+    }
+    else
+    {
+        cout<<"Stack is full!!\n";
+    }
+}
+
+int stack1::pop()
+{
+    int x;
+    if(!isEmpty())
+    {
+        x = stack2[top];
+        top--;
+        return x;
+    }
+    else
+    {
+        cout<<"Stack is empty!!\n";
+    }
+}
+
+int stack1::check1(char tkn)
+{
+    if(isEmpty())
+    {
+        return 0;
+    }
+    if(stack2[top] == '(')
+    {
+        if(tkn == ')')
+        {
+            return 1;
+        }
+        else
+        {
+            return 0;
+        }
+    }
+    if(stack2[top] == '{')
+    {
+        if(tkn == '}')
+        {
+            return 1;
+        }
+        else
+        {
+            return 0;
+        }
+    }
+    if(stack2[top] == '[')
+    {
+        if(tkn == ']')
+        {
+            return 1;
+        }
+        else
+        {
+            return 0;
+        }
+    }
+}
+
+void stack1::check()
+{
+    char tkn;
+    int x = 0;
+    for(int i = 0; infix[i]!='\0'; i++)
+    {
+        tkn = infix[i];
+        if(tkn == '('||tkn == ')'||tkn == '['||tkn == ']'||tkn == '{'||tkn == '}')
+        {
+            if(tkn == '('||tkn == '['||tkn == '{')
+            {
+                push(tkn);
+            }
+            if(tkn == '}'||tkn == ']'||tkn == ')')
+            {
+                x = check1(tkn);
+                if(x == 1)
+                {
+                    pop();
+                }
+                else
+                {
+                    push(tkn);
+                    break;
+                }
+            }
+        }
+    }
+    if(!isEmpty())
+    {
+        cout<<"Equation is not paranthesized!!\n";
+    }
+    else
+    {
+        cout<<"Equation is paranthesized!!\n";
+    }
+}
+
+void stack1::infix1()
+{
+    cout<<"\nEnter infix expression(end expression with '#'): ";
+    for(int  i = 0; i < 100; i++)
+    {
+        cin>>infix[i];
+        if(infix[i] == '#')
+        {
+            infix[i] = '\0';
+            break;
+        }
+    }
+}
+
+void stack1::display()
+{
+    for(int  i = 0; infix[i]!= '\0'; i++)
+    {
+        cout<<infix[i];
+    }
+    cout<<"\n";
+}
+
+int main()
+{
+    int ch = 0;
+    do
+    {
+        stack1 obj;
+        obj.infix1();
+        obj.display();
+        obj.check();
+        cout<<"\nDO YOU WANT TO CHECK ANOTHER EXPRESSION?\n";
+        cout<<"1. YES \n2. NO \n";
+        cin>>ch;
+    }while(ch == 1);
+    return 0;
+}