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C/C++ code:
]#include <unistd.h>
#include <signal.h>
#include <stdio.h>
int pid1,pid2;
int main( ) {
int fd[2];
char OutPipe[100],InPipe[100]; // ¶¨ÒåÁ½¸ö×Ö·ûÊý×é
pipe(fd); // ´´½¨¹ÜµÀ
while((pid1 = fork( )) == -1); // Èç¹û½ø³Ì1´´½¨²»³É¹¦,Ôò¿ÕÑ­»·
if(pid1 == 0) {
lockf(fd[1],1,0); // Ëø¶¨¹ÜµÀ
sprintf(OutPipe,"\n Child process 1 is sending message!\n");
write(fd[1],OutPipe,50); // Ïò¹ÜµÀдÈëÊý¾Ý
sleep(5); // µÈ´ý¶Á½ø³Ì¶Á³öÊý¾Ý
lockf(fd[1],0,0); // ½â³ý¹ÜµÀµÄËø¶¨
exit(0); // ½áÊø½ø³Ì1
}
else {
while((pid2 = fork()) == -1); // Èô½ø³Ì2´´½¨²»³É¹¦,Ôò¿ÕÑ­»·
if(pid2 == 0) {
lockf(fd[1],1,0);
sprintf(OutPipe,"\n Child process 2 is sending message!\n");
write(fd[1],OutPipe,50);
sleep(5);
lockf(fd[1],0,0);
exit(0);
}
else {
wait(0); // µÈ´ý×Ó½ø³Ì1 ½áÊø
read(fd[0],InPipe,50); // ´Ó¹ÜµÀÖжÁ³öÊý¾Ý


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