cngetc
while (!db_inputchar(cngetc()))
c = cngetc();
#define STEP(x) do {printf x, printf("\n"); cngetc();} while (0)
switch (cngetc()) {
cngetc();
if (cngetc() == '.')
if (cngetc() != 'n')
int cngetc (void);
c = cngetc();
c = cngetc();
c = cngetc();
c = cngetc();