Answer / e.sridhar reddy

#include<stdio.h>
#include<stdlib.h>
#include<unistd.h>
#include<sys/ipc.h>
#include<sys/types.h>
int main()
{
int p1[2],p2[2],i;
char buf[5];
pipe(p1);
pipe(p2);
if(fork()==0)
{
printf("\n this is child(the input text is text)\n");
close(p1[0]);
close(p2[1]);
write(p1[1],"text",5);
read(p2[0],buf,5);
write(1,buf,5);
}
else
{
printf("\n this is parent(the output text is text)\n");
close(p2[0]);
close(p1[1]);
read(p1[0],buf,5)
for(i=0;i<4;i++)
buf[i]=to upper(buf[i]);
write(p2[1],buf,5)
}
}

Answer / karthik chowdary

#include<stdio.h>
main()
{
int p1[2],p2[2],a;
char *msg1="hai";
char *msg2="infosys";
char *buff[7];
a=fork();
pipe[p1];
pipe[p2];
if(a==0)
{
write(p1[1],msg1,7);
sleep(5);
read(p2[0],buff,7);
printf("%s",buff);
}
else
{
read(p1[0],buff,7);
printf("%s",buff);
write(p2[1],msg2,7);
}
}

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