char array buffers
#include <iostream>
int main()
{
char buffer[80];
std::cout << "Enter the string: ";
std::cin >> buffer;
std::cout << "Here"s the buffer: " << buffer << std::endl;
return 0;
}Enter the string: string
Here"s the buffer: string
Copying a string using array notation
#include <iostream>
using std::cout;
using std::endl;
void copy1( char *, const char * );
int main()
{
char string1[ 10 ];
char *string2 = "Hello";
copy1( string1, string2 );
cout << "string1 = " << string1 << endl;
return 0;
}
void copy1( char * s1, const char * s2 )
{
for ( int i = 0; ( s1[ i ] = s2[ i ] ) != "\0"; i++ )
;
}string1 = Hello
Copying a string using pointer notation
#include <iostream>
using std::cout;
using std::endl;
void copy( char *, const char * );
int main()
{
char string1[ 10 ];
char string2[] = "Good Bye";
copy( string1, string2 );
cout << "string1 = " << string2 << endl;
return 0;
}
void copy( char *s1, const char *s2 )
{
for ( ; ( *s1 = *s2 ) != "\0"; s1++, s2++ )
;
}string1 = Good Bye
Get line with buffer size for char array reading
#include <iostream>
#include <string>
using namespace std;
const int kBufferSize = 1024;
int main(int argc, char** argv)
{
char buffer[kBufferSize + 1];
cin.getline(buffer, kBufferSize);
cout << buffer << endl;
string myString;
std::getline(cin, myString);
cout << myString << endl;
}initialized string
#include <iostream>
using namespace std;
int main(){
char str[] = "this is a test";
cout << str << endl;
return 0;
}Initializing char pointers with strings
#include <iostream>
using std::cout;
using std::cin;
using std::endl;
int main() {
const char* pstar1 = "AAA";
const char* pstar2 = "BBBB";
const char* pstar3 = "CCCCC";
const char* pstar4 = "DDDDDD";
const char* pstar5 = "EEEEEEE";
const char* pstar6 = "FFFFFFFF";
const char* pstr = "GGGGGGGGG";
cout << pstar1;
cout << pstar2;
cout << pstar3;
cout << pstar4;
cout << pstar5;
cout << pstar6;
return 0;
}AAABBBBCCCCCDDDDDDEEEEEEEFFFFFFFF
multidimensional char arrays
#include <iostream>
using namespace std;
int main()
{
const int ROWS = 3;
const int COLUMNS = 3;
char board[ROWS][COLUMNS] = { {"O", "X", "O"},
{" ", "X", "X"},
{"X", "O", "O"} };
for (int i = 0; i < ROWS; ++i)
{
for (int j = 0; j < COLUMNS; ++j)
cout << board[i][j];
cout << endl;
}
board[1][0] = "X";
for (int i = 0; i < ROWS; ++i)
{
for (int j = 0; j < COLUMNS; ++j)
cout << board[i][j];
cout << endl;
}
return 0;
}Read from keyboard and output char array
#include <iostream>
using namespace std;
int main(void){
int age;
float salary;
char name[128];
cout << "Enter your first name age salary: ";
cin >> name >> age >> salary;
cout << name << " " << age << " " << salary;
}reads multiple lines, terminates on "$" character
#include <iostream>
using namespace std;
const int MAX = 2000;
char str[MAX];
int main(){
cout << "\nEnter a string:\n";
cin.get(str, MAX, "$");
cout << "You entered:\n" << str << endl;
return 0;
}reads string with embedded blanks
#include <iostream>
using namespace std;
int main(){
const int MAX = 80;
char str[MAX];
cout << "\nEnter a string: ";
cin.get(str, MAX);
cout << "You entered: " << str << endl;
return 0;
}Reverse a string in place.
#include <iostream>
#include <cstring>
using namespace std;
int main()
{
char str[] = "this is a test";
char *start, *end;
int len;
char t;
cout << "Original: " << str << "\n";
len = strlen(str);
start = str;
end = &str[len-1];
while(start < end) {
// swap chars
t = *start;
*start = *end;
*end = t;
// advance pointers
start++;
end--;
}
cout << "Reversed: " << str << "\n";
return 0;
}Original: this is a test
Reversed: tset a si siht
Reverse case using array indexing.
#include <iostream>
#include <cctype>
using namespace std;
int main()
{
int i;
char str[80] = "This Is A Test";
cout << "Original string: " << str << "\n";
for(i = 0; str[i]; i++) {
if(isupper(str[i]))
str[i] = tolower(str[i]);
else if(islower(str[i]))
str[i] = toupper(str[i]);
}
cout << "Inverted-case string: " << str;
return 0;
}Original string: This Is A Test
Inverted-case string: tHIS iS a tEST
simple string variable
#include <iostream>
using namespace std;
int main(){
const int MAX = 80;
char str[MAX];
cout << "Enter a string: ";
cin >> str;
cout << "You entered: " << str << endl;
return 0;
}Treating character arrays as strings.
#include <iostream>
using std::cout;
using std::cin;
using std::endl;
int main()
{
char string1[ 20 ];
char string2[] = "string literal";
cout << "Enter the string: ";
cin >> string1;
cout << "string1 is: " << string1 << "\nstring2 is: " << string2;
for ( int i = 0; string1[ i ] != "\0"; i++ )
cout << string1[ i ] << " ";
cin >> string1;
cout << "\nstring1 is: " << string1 << endl;
return 0;
}Enter the string: string
string1 is: string
string2 is: string literals t r i n g
string
string1 is: string
Use cin.get() to read a string based on char array
#include <iostream>
int main()
{
char buffer[80];
std::cout << "Enter the string: ";
std::cin.get(buffer, 79); // get up to 79 or newline
std::cout << "Here"s the buffer: " << buffer << std::endl;
return 0;
}Enter the string: string
Here"s the buffer: string
Using an array of pointers to char
#include <iostream>
using std::cout;
using std::cin;
using std::endl;
int main() {
const char* pstars[] = {"A","BB","CCC","DDDD","EEEEE","FFFFFF"};
cout << pstars[2];
cout << endl;
return 0;
}CCC
