Gen.CPP

#include<iostream>
#include<conio.h>

using namespace std;

int kiemTraSoNu(int soNu);
int kiemTraNu(char nu);
char* xuatMach2(char mang[], int sophantu);

int main(){
	char *Nu;
	int sonu;
	char * Nu2;

	cout << "1 doan mach 3' 5' cua ban co bao nhieu Nu ?";
	cin >> sonu;
	cout << endl;
	while(kiemTraSoNu(sonu)){
		cin >> sonu;
		cout << endl;
	}
	Nu  = new char [sonu];
	Nu2 = new char [sonu];

	char nu;
	for(int i=0;i<sonu ;i++){
		cout << "Nu " << i+1 << " la : ";
		nu = getche();
		cout << endl;
		while(!kiemTraNu(nu)){
			cout << "Nu " << i+1 << " la : ";
		    nu = getche();
		    cout << endl;
		}
	}

	cout << "Mach 5' 3' la : " << endl;
	Nu2 = xuatMach2(Nu,sonu);
	for(int i=0;i<sonu ;i++){
		if((i+1)%3==0) cout << " ";
		cout << Nu2[i] ;
	}
}

int kiemTraSoNu(int soNu){
	if(soNu <= 0){
		cout << "So nu phai > 0";
        return 1;
	}
	if(soNu % 3 != 0){
		cout << "So nu phai chia het cho 3";
		return 1;
	}
	return 0;
}

int kiemTraNu(char nu){
	switch(nu){
		case 'A' : return 1; break;
		case 'T' : return 1; break;
		case 'G' : return 1; break;
		case 'X' : return 1; break;
	}
	return 0;
}

char* xuatMach2(int mang[], int sophantu){
	char *Nu2 = new char[sophantu];

	for(int i=0;i<sophantu ;i++){
		if(mang[i]=='A') Nu2[i] = 'T';
		if(mang[i]=='T') Nu2[i] = 'A';
		if(mang[i]=='G') Nu2[i] = 'X';
		if(mang[i]=='X') Nu2[i] = 'G';
	}
	return Nu2;
}