Read a 2-character string from input into variable userString. Declare a Boolean variable isValid and assign isValid with true if the following conditions are met: userString does not contain two of the same character. For alphabetic characters, userString does not contain two of the same letter (regardless of case). Otherwise, assign isValid with false. Ex: If the input is 2-, then isValid is assigned with true, so the output is: String accepted Ex: If the input is Tt, then isValid is assigned with false, so the output is: String not accepted Note: Use getline(cin, userString) to read the entire line from input into userString. #include #include #include using namespace std; int main() { string userString; /* Your code goes here */ if (isValid) { cout << "String accepted" << endl; } else { cout << "String not accepted" << endl; } return 0; }
Control structures
Control structures are block of statements that analyze the value of variables and determine the flow of execution based on those values. When a program is running, the CPU executes the code line by line. After sometime, the program reaches the point where it has to make a decision on whether it has to go to another part of the code or repeat execution of certain part of the code. These results affect the flow of the program's code and these are called control structures.
Switch Statement
The switch statement is a key feature that is used by the programmers a lot in the world of programming and coding, as well as in information technology in general. The switch statement is a selection control mechanism that allows the variable value to change the order of the individual statements in the software execution via search.
Read a 2-character string from input into variable userString. Declare a Boolean variable isValid and assign isValid with true if the following conditions are met:
- userString does not contain two of the same character.
- For alphabetic characters, userString does not contain two of the same letter (regardless of case).
Otherwise, assign isValid with false.
Ex: If the input is 2-, then isValid is assigned with true, so the output is:
String accepted
Ex: If the input is Tt, then isValid is assigned with false, so the output is:
String not accepted
Note: Use getline(cin, userString) to read the entire line from input into userString.
#include <iostream>
#include <string>
#include <cctype>
using namespace std;
int main() {
string userString;
/* Your code goes here */
if (isValid) {
cout << "String accepted" << endl;
}
else {
cout << "String not accepted" << endl;
}
return 0;
}
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