OpSys_Proj2.c

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <sys/wait.h>
while (number < 100)
    {
        for (int row = 0; row < nrows; ++row)
        {
            for (int col = 0; col < ncols; ++col)
            {
                a[row*ncols+col] += 1;
            }
        }
        number += 1;
    }
int main(int arg, char *argv[])
{
	int fd[2];

	if (pipe(fd) < 0) { perror("pipe"); return 1; }

	int pid1 = fork();

	if (pid1 < 0) { perror("fork"); return 1; }

	else if (pid1 == 0)
	{
    	dup2(fd[1], 1);
    	close(fd[0]);
    	close(fd[1]);
	}

	else
	{
    	int pid2 = fork();
    	if (pid2 < 0) { perror("fork"); return 1; }

    	else if (pid2 == 0)
    	{
        	close(fd[1]);
        	dup2(fd[0], 0);
        	close(fd[0]);

        	char *myargs[3];
        	myargs[0] = strdup("wc");
        	myargs[2] = NULL;
        	execvp(myargs[0], myargs);
    	}
   	 pin 7 goes to +12 v
pin 4 g0es to -12 v
pin 4 and 3 of the 741 and dac respectively go to -12 v
get from power supply
put into random row
then connect to the same row as the one thats goiing to the power supply (dont put any other wire across the bridge)

    	else
    	{
        	close(fd[0]);
        	close(fd[1]);
        	wait(0); wait(0);
    	}
	}

	return 0;

}




click on select go to 25 v side, 25 volt is max, so sleect it and go to 5v, thjen

one as 5 volt rail (6 volt max)
one as ground (black and black)
one as 25 (25 volt max)
one as -25 (-25 volt max)

5 volt DOES NOT share the same line as the 12 volt