Read a 3-character string from input into variable inString. Declare a Boolean variable allAlphas and assign allAlphas with true if inString only contains alphabetic characters. Otherwise, assign allAlphas with false. Ex: If the input is mgg, then allAlphas is assigned with true, so the output is: String is valid Ex: If the input is ^zc, then allAlphas is assigned with false, so the output is: String is not valid Note: Use getline(cin, inString) to read the entire line from input into inString. #include #include #include using namespace std; int main() { string inString; /* Your code goes here */ if (allAlphas) { cout << "String is valid" << endl; } else { cout << "String is not valid" << 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 3-character string from input into variable inString. Declare a Boolean variable allAlphas and assign allAlphas with true if inString only contains alphabetic characters. Otherwise, assign allAlphas with false.
Ex: If the input is mgg, then allAlphas is assigned with true, so the output is:
String is valid
Ex: If the input is ^zc, then allAlphas is assigned with false, so the output is:
String is not valid
Note: Use getline(cin, inString) to read the entire line from input into inString.
#include <iostream>
#include <string>
#include <cctype>
using namespace std;
int main() {
string inString;
/* Your code goes here */
if (allAlphas) {
cout << "String is valid" << endl;
}
else {
cout << "String is not valid" << endl;
}
return 0;
}
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