Odtnhj

Aim is to make sure that the user entered input for string 1 and string 2 contains only characters A,T,G or C in any order. If either string contains another other character then error should be displayed. Example:

Input contains error

Error in String #1: aacgttcOgMa

Error in String #2: ggataccaSat

This is my attempt at LCS.cpp file code:

#include "LCS.h"
#include <string>

using namespace std;

bool validate(string strX, string strY)
{

string x = strX;
string y = strY;
char searchItem = 'A';
char searchItem = 'C';
char searchItem = 'G';
char searchItem = 'T';
int numOfChar = 0;
int m = strX.length();
int n = strY.length();
for (int i = 0; i < m; i++)

 if (x[i] == searchItem)
 
 numOfChar++;

 
for (int i = 0; i < n; i++)
 
 if (y[i] == searchItem)
 
 numOfChar++;

 

This is my LCS.h file code:

#pragma once
#ifndef LCS_H
#define LCS_H

#include <string>

using namespace std;

bool validate(string strX, string strY);
#endif

And my driver file "Driver6.cpp" has this code:

#include "LCS.h"
#include <iostream>
#include <string>


using namespace std;

int main()

string strX, strY;

cout << "String #1: ";
cin >> strX;
cout << "String #2: ";
cin >> strY;

//validate the input two strings
if (validate(strX, strY) == false)

 return 0;


int m = strX.length();
int n = strY.length();

Didn't really want to do this but it seems like the best bet rather than going round the houses in the comments:

#include <string>
#include <iostream>

bool validate( const std::string & s ) 
 for ( auto c : s ) 
 if ( c != 'A' && c != 'T' && c != 'C' && c != 'G' ) 
 return false;
 
 
 return true;


int main() 
 std::string s1 = "ATGCCCG";
 std::string s2 = "ATGfooCCCG";

 if ( validate( s1 ) ) 
 std::cout << "s1 is validn";
 
 else 
 std::cout << "s1 is not validn";
 
 if ( validate( s2 ) ) 
 std::cout << "s2 is validn";
 
 else 
 std::cout << "s2 is not validn";
 

Another technique:

bool validate(const std::string& s)

 const static std::string valid_letters("ATCGatcg");
 for (auto c: s)
 
 std::string::size_type position = valid_letters.find_first_of(c);
 if (position == std::string::npos)
 
 return false;
 
 
 return true;

The above code searches a container of valid letters.