Question

Write a program that will take a string as input.
The program will then determine whether each
left parenthesis '(' has a matching right
parenthesis). If so, the program will print 0
else the program will print 1.
For example,
For the input provided as follows:
HELLO AND (WELCOME (TO THE) TCEA
(CONTEST)TODAY) IS (SATURDAYO)
The output of the program will be:
0
Another example,
For the input provided as follows:
(9x(7-2)* (15)
The output of the program will be:
1​

Answer 1

Answer:

#include <iostream>

using namespace std;

int main() {

   string str;

   cout<<"Enter the string: ";

   getline(cin, str);

   cout<<str;

   if((getline(str,'('))&&(getline(str,')')))

   {

       cout<<"0";

   }

   else

   {

       cout<<"1";

   }

   return 0;

}

Explanation:

• We first declare the variables that will be used in the program.  Since the program has to take a string as input, we declare the variable str of the string data type.
• Next statement of the program displays a message on the screen asking the user to enter a string.
• The string is read and stored using the getline function. The getline function reads and stores every character of the string including spaces.
• The next step is to check every character for the presence of parentheses. To do this, we use the if-else loop.
• The expression first checks whether '(' is present in the entire string.  If it is present, then the expression gives a logic high result.
• Similarly, the expression then checks whether ')' is present in the entire string. If it is present, then the expression gives a logic high result.
• The results of both the expressions are logically ANDed.
• If both the results are high, it implies that a pair of parenthesis is present and the if statement block is executed which prints the output as zero.
• If either one of the results is low, it implies that a pair of parenthesis is not present and the else statement block is executed which prints the output as one.
• After printing the output, the program is terminated.

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