main commit for q1 of lab5

Author: GhazaleZe

lab5_question1.c

@@ -0,0 +1,78 @@
+#include<unistd.h>
+#include<sys/types.h>
+#include<stdio.h>
+#include<signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/wait.h>
+#include <time.h>
+
+#define MAX_CHILD 5
+
+int main(){
+	int fd[MAX_CHILD][2];
+	int v=100,i,which;
+	int total=0;
+	int Chile_process=0;
+	char buffer[256];
+	int mypipe[MAX_CHILD];
+	pid_t pid[MAX_CHILD];
+	char parent_buffer[256];
+
+	for(i=0;i<MAX_CHILD;i++){
+
+		mypipe[i]=pipe(fd[i]);
+		pid[i]=fork();
+		
+		//which=i;
+
+		if(pid[i]==0){
+			Chile_process=1;
+			break;
+		}
+
+	}
+
+	while(Chile_process==1)
+	{
+		close(fd[i][0]);
+		srand(time(NULL)+getpid());
+        int myrandnum= rand()%10+1;
+		printf("in child and i is %d and myrandnum is %d\n",i,myrandnum);
+
+		sprintf(buffer,"%d", myrandnum);
+		printf("%s\n",buffer);
+        write(fd[i][1],buffer,255);
+        printf("pass write\n");
+        sleep(myrandnum);
+	}
+
+	while(Chile_process==0){
+		//close(fd[i][1]);
+		for(int k=0;k<MAX_CHILD;k++){
+			close(fd[i][1]);
+			if(read(fd[k][0],buffer,255)>0)
+            {
+              total+=atoi(buffer);
+              printf("the total is %d \n", total);
+
+    			sleep(1);
+            }
+
+        }
+
+        if (total>30)
+            {
+              	printf("now total is %d\n", total);
+              		 kill(0, SIGKILL);
+                printf("process is killed\n");
+                //sleep(1);
+              	}
+               
+            }
+	
+	
+
+    return 0;
+}
+