Reading by Pipe in Server

While i am reading in Server add result , i am getting garbage value.
Please let me know where i am doing wrong.
<code>#include <sys/types.h>
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <sys/wait.h>
#include <fcntl.h>
#include <string.h>

struct Operation
{
  int num1;
  int num2;
  char operator;
  int result;
};

int main()
{
	pid_t ret,add_pid,Client_pid;
	pid_t child1,child2,child3,child4;
	int pipefd_Client[2] , pipefdadd[2];
  int temp;
	char *message,run_time;
	char *file_message = "In process one\r\n";
	char sfdread[4],sfdwrite[4],tempBuf[4];
	int i=0,exit_code = 0,status,exec_error ;
	struct Operation objptr,readptr;// = {0,0,'0',0};

	printf("Service Handler Start \n");
	printf("Switch \n");
	int fd = pipe(pipefdadd);
	if(fd == -1)
	{
		perror("Pipe open error");
		exit(1);
	}
	fd = pipe(pipefd_Client);
	if(fd == -1)
	{
		perror("Pipe open error");
		exit(1);
	}


	Client_pid = fork();
	switch(Client_pid)
	{
		case -1:
			perror("Fork Failed");
			break;
		case 0:
			sprintf(sfdread,"%d",pipefd_Client[0]);
			sprintf(sfdwrite,"%d",pipefd_Client[1]);
			exec_error = execl("./client.o","client.o",sfdread,sfdwrite,0);
			if(exec_error == -1)
			{
				perror("Execl failed");
			}

			break;
		default:
		  close(pipefd_Client[1]);
			fcntl(pipefd_Client[0],F_SETFL,O_NONBLOCK);
			printf("IN Service Handler reading from client pipe\n");
			sleep(4);
			read(pipefd_Client[0],&objptr,sizeof(objptr));
			if(objptr.operator == '+')
			{
				write(STDOUT_FILENO,"Done",5);
				printf("Addition  %d  \n",objptr.num1+objptr.num2 );
			}
			//write(pipefd[1],"Lol is everywhere\r\n",strlen(file_message));
			close(pipefd_Client[0]);
			//wait(Client_pid);
			//waitpid(Client_pid, &status, WNOHANG);
			break;

	}


	add_pid = fork();
	switch(add_pid)
	{
		case -1:
			perror("Fork Failed");
			break;
		case 0:
			sprintf(sfdread,"%d",pipefdadd[0]);
			sprintf(sfdwrite,"%d",pipefdadd[1]);
			exec_error = execl("./add.o","add.o",sfdread,sfdwrite,0);
			if(exec_error == -1)
			{
				perror("Execl failed");
			}

			break;
		default:

		  close(pipefdadd[0]);
			write(pipefdadd[1],&objptr,sizeof(struct Operation));
			//write(pipefd[1],"Lol is everywhere\r\n",strlen(file_message));
			close(pipefdadd[1]);
			// objptr.num1 = objptr.num1 + objptr.num2 ;
			// printf("Sum is %d\n",objptr.num1 );
			//sleep(4);
      waitpid(add_pid, &status, 0);

      //sleep(14);
			//close(pipefdadd[1]);
      //fcntl(pipefdadd[0],F_SETFL,O_NONBLOCK);
			read(pipefdadd[0],&readptr,sizeof(struct Operation));
			//write(pipefd[1],"Lol is everywhere\r\n",strlen(file_message));
			close(pipefdadd[0]);
      printf("Service Handler Sum is %d  %d\n",readptr.result,readptr.num1);
			close(pipefd_Client[0]);


			printf("Writing Result to client pipe\n");
			//sleep(4);
		  write(pipefd_Client[1],&temp,sizeof(int));

			//write(pipefd[1],"Lol is everywhere\r\n",strlen(file_message));
			close(pipefd_Client[1]);
			//wait(NULL);
			//waitpid(Client_pid, &status, WNOHANG);
			break;

	}

	exit (0);
}
</code>