Accessing characters in a string
#include <iostream>
#include <string>
#include <cctype>
using std::cout;
using std::cin;
using std::endl;
using std::string;
int main() {
string text = "asdffdsaasdf";
int vowels = 0;
int consonants = 0;
for(int i = 0 ; i < text.length() ; i++)
if(std::isalpha(text[i]))
switch(std::tolower(text[i])) {
case "a": case "e": case "i":
case "o": case "u":
vowels++;
break;
default:
consonants++;
}
cout << "Your input contained "
<< vowels << " vowels and "
<< consonants << " consonants."
<< endl;
return 0;
}Your input contained 3 vowels and 9 consonants.
accessing characters in string objects
#include <iostream>
#include <string>
using namespace std;
int main(){
char charray[80];
string word;
cout << "Enter a word: ";
cin >> word;
int wlen = word.length();
cout << "One character at a time: ";
for(int j=0; j<wlen; j++)
cout << word.at(j);
word.copy(charray, wlen, 0);
charray[wlen] = 0;
cout << "\nArray contains: " << charray << endl;
return 0;
}Is it a string::npos
#include <iostream>
#include <string>
using namespace std;
int main()
{
string word1 = "Game";
string word2("Over");
string word3(3, "!");
string phrase = word1 + " " + word2 + word3;
cout << phrase << endl;
if (phrase.find("eggplant") == string::npos)
cout << ""eggplant" is not in the phrase.\n\n";
return 0;
}Modify char in a string by indexer
#include <iostream>
using std::cout;
using std::endl;
#include <string>
using std::string;
int main()
{
string string1( "cat" );
string string2;
string string3;
string2 = string1;
string3.assign( string1 );
cout << "string1: " << string1 << "\nstring2: " << string2
<< "\nstring3: " << string3 << "\n\n";
string2[ 0 ] = string3[ 2 ] = "r";
cout << "string1: " << string1 << "\nstring2: " << string2 << "\nstring3: ";
return 0;
}string1: cat
string2: cat
string3: cat
string1: cat
string2: rat
string3: "
switch statement based on char value
#include <iostream>
#include <string>
#include <cctype>
using std::cout;
using std::cin;
using std::endl;
using std::string;
int main() {
string text = "asdffdsaasdf";
int vowels = 0;
int consonants = 0;
for(int i = 0 ; i < text.length() ; i++)
if(std::isalpha(text[i]))
switch(std::tolower(text[i])) {
case "a": case "e": case "i":
case "o": case "u":
vowels++;
break;
default:
consonants++;
}
cout << "Your input contained "
<< vowels << " vowels and "
<< consonants << " consonants."
<< endl;
return 0;
}Your input contained 3 vowels and 9 consonants.
