J.Pearce@cs.ucl.ac.uk (11/14/90)
Could someone please tell how MPW C represents a "plain" int - is it 2 or 4 bytes. Many thanks, John Pearce jpearce@uk.ac.ucl.cs Computer Science Department University College London
leyser@nitrex.UUCP (Jeff Leyser) (11/16/90)
In post <1278@ucl-cs.uucp>, J.Pearce@cs.ucl.ac.uk says:
!
!Could someone please tell how MPW C represents a "plain" int -
!is it 2 or 4 bytes.
I don't have MPW. But compile and run this:
main() {
printf("An int is %d bytes\n",sizeof(int));
}
--
Jeff Leyser Hey, would *you* be a spokesman for
leyser@nitrex.UUCP. a Big Oil Company(tm)?hanche@imf.unit.no (Harald Hanche-Olsen) (11/18/90)
In article <505@nitrex.UUCP> leyser@nitrex.UUCP (Jeff Leyser) writes: main() { printf("An int is %d bytes\n",sizeof(int)); } Actually, that code isn't portable. What if sizeof() returns a long? It often does. Of course, it is often the case that int == long, so on most compilers you won't notice the difference. I really don't know how to make a piece of code like the above portable, unless you say things like printf("An int is %ld bytes\n",(long)sizeof(int)); Yeah, that should do it. Or should that be unsigned long? Ahhh, the joys of portable programming... - Harald Hanche-Olsen <hanche@imf.unit.no> Division of Mathematical Sciences The Norwegian Institute of Technology N-7034 Trondheim, NORWAY
Ken.Knight@f421.n109.z1.fidonet.org (Ken Knight) (11/18/90)
MPW ints are 4 byte values versus Think C and its 2 byte values. MPW shorts are 2 bytes and if you use long you'll get 4 byte values (same as the int). -- Ken Knight, Ken.Knight@f421.n109.z1.fidonet.org via The Black Cat's Shack's FidoNet<->Usenet Gateway blkcat.fidonet.org and Fidonet 1:109/401
d88-jwa@dront.nada.kth.se (Jon W{tte) (11/18/90)
In article <HANCHE.90Nov17172757@hufsa.imf.unit.no> hanche@imf.unit.no (Harald Hanche-Olsen) writes: >In article <505@nitrex.UUCP> leyser@nitrex.UUCP (Jeff Leyser) writes: > main() { > printf("An int is %d bytes\n",sizeof(int)); > } >Actually, that code isn't portable. What if sizeof() returns a long? >It often does. Of course, it is often the case that int == long, so The printf ( "%ld" , ( long ) sizeof ( int ) ) ; should work. If it's unsigned or signed doesn't matter, since the result very seldom is > 8 ( or negative :-) h+ h+@nada.kth.se "Moof!(tm)"
Chris.Gehlker@p12.f56.n114.z1.fidonet.org (Chris Gehlker) (11/20/90)
leyser@nitrex.UUCP (Jeff Leyser) Writes: > In post <1278@ucl-cs.uucp>, J.Pearce@cs.ucl.ac.uk says: > ! > !Could someone please tell how MPW C represents a "plain" int - > !is it 2 or 4 bytes. > > I don't have MPW. But compile and run this: > > main() { > printf("An int is %d bytes\n",sizeof(int)); > } Just to end the suspense, it's 4 bytes. -- Uucp: ...{gatech,ames,rutgers}!ncar!asuvax!stjhmc!56.12!Chris.Gehlker Internet: Chris.Gehlker@p12.f56.n114.z1.fidonet.org