// testing fgets and my_strlen
//
#include <string.h>
#include <stdio.h> // stdin, stdout, stderr

// printf( "fmt", ...) same as: fprintf( stdout, "fmt", ...)
// scanf( "fmt", ...) same as: fscanf( stdin, "fmt", ...)
 
#define SIZE 8096 // size of the line char array

size_t my_strlen( const char s[])
{
  // size_t len = 0; while( s[len] != 0) ++len; // using array indexing
  // size_t len = 0; while( *s != 0) { ++len; ++s; } // using pointer and counter
  // return len;
  const char *save = s; while( *s != 0) ++s; // using just pointers
  return s-save;
}
int main( void)
{
  char line[SIZE];
  while( fgets( line, SIZE, stdin) ) {
    char *p = strchr( line, '\n'); if( p != 0) *p = 0; // kill newline
    printf( "%zi: ", my_strlen(line) );
    printf( "%s\n", line);
    // fputs( line, stdout);
  }
  return 0;
}