// This code is Public Domain. Use, modify, and redistribute at will.
// ----------------------------------------------------------------------------
-char * strcat( char * restrict s1, const char * restrict s2 ) { /* TODO */ };
+char * strcat( char * restrict dest, const char * restrict src )
+{
+ char * dest_p = dest;
+ if ( *dest_p != '\0' )
+ {
+ while ( *++dest_p != '\0' )
+ {
+ // EMPTY
+ }
+ }
+ while ( (*dest_p++ = *src++) != '\0' )
+ {
+ // EMPTY
+ }
+ return dest;
+}