int file_column_count ( string filename );
int file_row_count ( string input_filename );
int i4block_components ( int l, int m, int n, int a[], int c[] );
int i4_min ( int i1, int i2 );
int i4mat_components ( int m, int n, int a[], int c[] );
int *i4mat_data_read ( string input_filename, int m, int n );
void i4mat_header_read ( string input_filename, int *m, int *n );
int i4vec_components ( int n, int a[], int c[] );
int s_len_trim ( string s );
int s_to_i4 ( string s, int *last, bool *error );
bool s_to_i4vec ( string s, int n, int ivec[] );
int s_word_count ( string s );
void timestamp ( );