C Tutorial/String/String Copy

Copying a string using array notation and pointer notation

<source lang="cpp">#include <stdio.h> void copy1( char *s1, const char *s2 ); void copy2( char *s1, const char *s2 ); int main() {

  char string1[ 10 ];          
  char *string2 = "Hello";     
  char string3[ 10 ];          
  char string4[] = "Good Bye"; 
  copy1( string1, string2 );
  printf( "string1 = %s\n", string1 );
  copy2( string3, string4 );
  printf( "string3 = %s\n", string3 );
  return 0;

} void copy1( char *s1, const char *s2 ) {

  int i;
  for ( i = 0; ( s1[ i ] = s2[ i ] ) != "\0"; i++ ) {
     ;   
  } 

} void copy2( char *s1, const char *s2 ) {

  for ( ; ( *s1 = *s2 ) != "\0"; s1++, s2++ ) {
     ;   
  } 

}</source>

string1 = Hello
string3 = Good Bye

Take a first name and a last name and combines the two strings

<source lang="cpp">#include <string.h>

   #include <stdio.h>
   int main()
   {
       char first[100];
       char last[100];
       char full_name[200];

       strcpy(first, "first");
       strcpy(last, "last");
       strcpy(full_name, first);

       strcat(full_name, " ");
       strcat(full_name, last);
       printf("The full name is %s\n", full_name);
       return (0);
   }</source>

The full name is first last