TIP: Using a delay in C

[silveira neto]

Using a delay in C, using Linux. gcc-3.3
This program do a boy in a bike runing in the screen. :D
Its cool to see about games and delay in C.

#include<stdio. h>
int branco(int j){
int k;
for (k=0;k<j;k++)
{
printf(" ");
}

}
int main(){
int i;
for(i=0;i<20;i+ +)
{
//limpa a tela
printf("\033[H\033[2J");
usleep(50000);
branco(i);
printf(" __@\n");
branco(i);
printf(" _`\\<,_\n");
branco(i);
printf(" (*)/ (*)\n");

}
}

[Mike Wahler]

"silveira neto" <ot**********@y ahoo.com.br> wrote in message
news:be******** *************** *******@localho st.talkaboutpro gramming.com...

Using a delay in C, using Linux. gcc-3.3
This program do a boy in a bike runing in the screen. :D
Its cool to see about games and delay in C.
What you have below is not (standard) C.

#include<stdio. h>
int branco(int j){
int k;
for (k=0;k<j;k++)
{
printf(" ");
}

}
int main(){
int i;
for(i=0;i<20;i+ +)
{
//limpa a tela
printf("\033[H\033[2J");
This string argument to 'printf()' depends upon the standard
input device interpreting it a particular way. Not portable at all.
usleep(50000);
No such function in standard C.
branco(i);
printf(" __@\n");
branco(i);
printf(" _`\\<,_\n");
branco(i);
printf(" (*)/ (*)\n");

}
return 0; /* mandatory for C89, optional for C99 */
}

A 'cute' little program only usable on a limited number
of platforms/configurations.

-Mike

[E. Robert Tisdale]

> expand delay.c
#include<stdio. h>
#include<stdlib .h>

void branco(int j) {
for (int k = 0; k < j; ++k) {
printf(" ");
}
}

int main(int argc, char* argv[]) {
extern int usleep(unsigned long usec);
for(int i = 0; i < 20; ++i) {
//limpa a tela
printf("\033[H\033[2J");
usleep(50000);
branco(i);
printf(" __@\n");
branco(i);
printf(" _`\\<,_\n");
branco(i);
printf(" (*)/ (*)\n");
}
return EXIT_SUCCESS;
}

[Peter Nilsson]

"silveira neto" <ot**********@y ahoo.com.br> wrote in message
news:be******** *************** *******@localho st.talkaboutpro gramming.com...

Using a delay in C, using Linux. gcc-3.3
This group is about ISO C, i.e. programs which compile and run on _all_
platforms, not just Linux using GNU C.
This program do a boy in a bike runing in the screen. :D
Its cool to see about games and delay in C.
Please post such unix specific 'tips' to unix specific groups.
<snip>

A near ISO C equivalent would be something like...

#include <stdio.h>
#include <time.h>

void usleep(unsigned long u)
{
clock_t end, start = clock();
if (start == (clock_t) -1) return;
end = start + CLOCKS_PER_SEC * (u / 1000000.0);
while (clock() != end) ;
}

int main(void)
{
int i;
for (i = 0; i < 20; i++)
{
usleep(500000);
puts("\n\n\n\n\ n\n\n\n\n\n\n\n \n\n\n\n\n\n\n\ n\n\n\n\n\n");
puts("\n\n\n\n\ n\n\n\n\n\n\n\n \n\n\n\n\n\n\n\ n\n\n\n\n\n");
printf("%*s\n", 10 + i * 2, " __@ ");
printf("%*s\n", 10 + i * 2, " _`\\<,_");
printf("%*s\n", 10 + i * 2, "(*)/ (*) ");
}
return 0;
}

--
Peter

[Peter Nilsson]

"Mike Wahler" <mk******@mkwah ler.net> wrote in message
news:u%******** **********@news read2.news.pas. earthlink.net.. .

"silveira neto" <ot**********@y ahoo.com.br> wrote in message
news:be******** *************** *******@localho st.talkaboutpro gramming.com...

int main(){

....
return 0; /* mandatory for C89, optional for C99 */

}

It's not _mandatory_ in C89 in the strictest sense, merely desirable.

--
Peter

[Severian]

On Sun, 25 Jan 2004 15:05:20 +1100, "Peter Nilsson"
<ai***@acay.com .au> wrote:

while (clock() != end) ;

You may be spinning for a long time. I would recommend < instead of
!=.

- Sev

[E. Robert Tisdale]

Peter Nilsson wrote:

silveira neto wrote:

Using a delay in C, using Linux. gcc-3.3

This group is about ISO C,
i.e. programs which compile and run on _all_ platforms,
not just Linux using GNU C.

Nonsense!
There are almost *no* useful C programs
which compile and run on _all_ platforms.

This program do a boy in a bike running in the screen. :D
It's cool to see about games and delay in C.

A near ISO C equivalent would be something like...

#include <stdio.h>
#include <time.h>

void usleep(unsigned long u) {
clock_t start = clock();
if (start != (clock_t)(-1)) {
clock_t end = start + CLOCKS_PER_SEC* (u/1000000.0);
while (clock() != end);
}
}
int main(int argc, char* argv[]) {
for (int i = 0; i < 20; ++i) {
usleep(500000);
puts("\n\n\n\n\ n\n\n\n\n\n\n\n \n\n\n\n\n\n\n\ n\n\n\n\n\n");
puts("\n\n\n\n\ n\n\n\n\n\n\n\n \n\n\n\n\n\n\n\ n\n\n\n\n\n");
printf("%*s\n", 10 + i * 2, " __@ ");
printf("%*s\n", 10 + i * 2, " _`\\<,_");
printf("%*s\n", 10 + i * 2, "(*)/ (*) ");
}
return 0;
}

It's more portable. And even more readable.
But it sucks compared to the original when I run it.

[Peter Nilsson]

"E. Robert Tisdale" <E.************ **@jpl.nasa.gov > wrote in message
news:40******** ******@jpl.nasa .gov...

Peter Nilsson wrote:

silveira neto wrote:

Using a delay in C, using Linux. gcc-3.3
This group is about ISO C,
i.e. programs which compile and run on _all_ platforms,
not just Linux using GNU C.

Nonsense!
There are almost *no* useful C programs
which compile and run on _all_ platforms.

On the contrary, there's quite a lot you can do in pure ISO C. [cf. early
POVRAY]

But yes, I should have said code, not programs.
<snip ISO variation>

It's more portable. And even more readable.
But it sucks compared to the original when I run it.

Maybe next time, I'll allocate the time to output a DVD quality mpeg file.

--
Peter

[Peter Nilsson]

"Severian" <se******@chlam ydia-is-not-a-flower.com> wrote in message
news:8i******** *************** *********@4ax.c om...

On Sun, 25 Jan 2004 15:05:20 +1100, "Peter Nilsson"
<ai***@acay.com .au> wrote:

while (clock() != end) ;

You may be spinning for a long time. I would recommend < instead of
!=.

True! My port of gcc has CLOCKS_PER_SEC of 93 and a resolution of 5!

--
Peter

[Emmanuel Delahaye]

In 'comp.lang.c', "Peter Nilsson" <ai***@acay.com .au> wrote:

> int main(){

...

return 0; /* mandatory for C89, optional for C99 */

> }

It's not _mandatory_ in C89 in the strictest sense, merely desirable.

I think it is (mandatory), unless, the returned value is not defined (some
platform force 0, but it's not a C90 rule).

--
-ed- em**********@no os.fr [remove YOURBRA before answering me]
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