Your program will take arguments from the command-line , including one or more i

Question

Your program will take arguments from the command-line, including one or more input strings to be evaluated with your recursive palindrome-checking function. An optional command-line flag (-c), if included in the command line, will tell your program to be case-sensitive for all input strings. The default condition (i.e. if the flag is NOT included) is to ignore case-sensitivity. So, for example, "Mom" should evalate as a palindrome if the -c flag is not included in the command-line, but should evaluate as NOT a palindrome if -c is included.

Important note: Spaces normally separate command line arguments (in this case, the input strings), but a string with spaces can be passed to a program at the command line by putting it in double quotes (e.g. "this will be read by my program as a single string"). The quote characters are not included in the string that gets parsed.

Requirements

Assume that if the case-sensitivity flag (-c) is present, it is always the first parameter passed at the command line.

Allow both uppercase and lowercase versions of the flag (i.e. -c and -C should do the same thing).

Your program should not take any user input (i.e. "cin" should not be anywhere in your code).

You must have the following functions:printUsageInfo - Print program usage information in case no input strings were found at command line.

Parameter(s): a string (passed by constant reference) representing the name of the executable from the command line.

Return: void.

isPalindrome - This function determines whether a string is a character-unit palindrome.

Parameter(s): an input string (passed by constant reference), and a boolean flag that says whether to consider case-sensitivity.

Return: bool.

Explanation / Answer

#include<iostream>
#include<string>
using namespace std;

int main(int argc, char *argv[]){
char string1[20];
int i, length;
int flag = 0;
if(argc==3)
string1=*argv[2];
else
   string1=*argv[1];

length = strlen(string1);
if(strcmp(*argv[1],"-C")==0)
{
for(i=0;i < length ;i++){
if(isupper(string1[i]) != isupper(string1[length-i-1]) && string1[i] != string1[length-i-1]){
flag = 1;
break;
   }
   }
}
else
{
   for(i=0;i < length ;i++){
if(string1[i] != string1[length-i-1]){
flag = 1;
break;
   }
   }
}
if (flag) {
cout << string1 << " is not a palindrome" << endl;
}
else {
cout << string1 << " is a palindrome" << endl;
}
system("pause");
return 0;
}

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