C++ Strings

#include <string>
using namespace std;

string bla;
bla = "text";
bla = "this" + " is a " + "text!";
if (bla == "blup") ...

cout << bla.size();
cout << bla.find("x");


C-String

char cs[20] = "hello"; // CAN only assign in initialization!!!!
cs = "bla";  // DOES NOT WORK!
cout << cs + "something else"  // DOES NOT WORK
if (cs == "bla") // DOES NOT WORK
cout << cs; // does work

char xxx[100];
char bla[100] = "this is a test";

for (int i=0;bla[i]!='\0';i++) {
  cout << bla[i] << " ";
}

alternative for bla[i]!='\0'     
  bla[i] != 0
  bla[i]


#include <cstring>

// int strcmp(char a[], bla b[])
char a[5] = "bla";
char b[6] = "blup";
if ( strcmp(a,b) == 0)  // compares a and b for equality

strcpy(b,a);   // would be b=a;
strcat(b,a);  // would be b = b+a;

strncpy(b,a,5); // safe version of strcpy

cin >> b;

// cout << static_cast<char>(toupper(a[1])); // toupper is in <cctype>

ask the user for an input
read in a c-string
while the end of the string is not reached
  print the upper case version of the character at the current index


cin >> bla[100]; // WRONG: This tries to input 1 character into index 100