Create balanced & unbalanced parenthesis

C/balanced & unbalanced parenthesis

@@ -0,0 +1,84 @@
+#include<stdio.h>
+#include<string.h>
+#define SIZE 20
+char STACK[SIZE];
+int top=-1;
+void push(char item)
+{
+	if(top==SIZE-1)
+	printf("\nSTACK IS OVERFLOW");
+	else
+	{
+		top++;
+		STACK[top]=item;
+	}
+}
+void pop()
+{
+if(top==-1)
+printf("\nunderflow");
+else
+top--;	
+}
+int main(void)
+{
+	char exp[SIZE];
+	int len,i;
+	printf("\nenter the expression");
+	scanf("%s",exp);
+	len=strlen(exp);
+	for(i=0;i<len;i++)
+	{
+
+		if(exp[i]=='(' || exp[i]=='{' || exp[i]=='[')
+		{
+			push(exp[i]);
+			continue;
+		}
+		else if(exp[i]==')' || exp[i]=='}' || exp[i]==']')
+		{
+			if(exp[i]==')')
+			{
+				if(STACK[top]=='(')
+				{
+					pop();
+				}
+				else
+				{
+					printf("\nUNBALANCED PARENTHESIS");
+					return 0;
+				}
+			}
+			else if(exp[i]=='}')
+			{
+				if(STACK[top]=='{')
+				{
+					pop();
+				}
+				else
+				{
+					printf("\nUNBALANCED PARENTHESIS");
+					return 0;
+				}
+			}
+				else if(exp[i]==']')
+				{
+					if(STACK[top]=='[')
+					{
+						pop();
+					}
+					else
+					{
+						printf("\nUNBALANCED PARENTHESIS");
+						return 0;
+					}
+				}
+			}
+		}
+
+	if(top!=-1)
+	printf("\nUNBALANCED PARENTHESIS");
+	else
+	printf("\nBALANCED PARENTHESIS");
+	return 0;
+}