HP SunSoft Pascal 4.0 Manuale Utente Scaricare il pdf (Pagina 130)

100

101

106 Pascal 4.0 User’s Guide

The record in the example above has, by default, the same size and alignment

as the equivalent C record. Some records, though, are laid out differently

unless you use the -calign option.

The C main program,

StruChrMain.c

#include <stdio.h>

#include <string.h>

struct TVarLenStr {

int NBytes;

char a[25];

};

extern void StruChr(struct TVarLenStr *);

int main(void)

{

struct TVarLenStr vls;

char s25[25];

vls.NBytes = 0;

StruChr(&vls);

strncpy(s25, vls.a, vls.NBytes);

printf(" s25 = '%s' \n", s25);

printf(" strlen(s25) = %d \n", strlen(s25));

}

The commands to compile and

execute StruChr.p and

StruChrMain.c

hostname% pc -c StruChr.p

hostname% cc StruChr.o StruChrMain.c -lpc

hostname% a.out

s25='St. Petersburg'

strlen(s25) = 13

1 2 ... 125 126 127 128 129 130 131 132 133 134 135 ... 332 333

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