File content as of revision 0:9952fdc226ac:

#include "mbed.h"
Serial pc(USBTX,USBRX);
//sonar sensor
AnalogIn sonar(p19); //range sensor 9.8mV/inch

int main()
{
    while(1) {
        float distance,x;
        int num_iterations,i;
        pc.scanf("%d",&num_iterations);//reads in values from the Matlab
        for(i=1; i<=num_iterations; i++) { //will go until it meets the number of iterations
            x = sonar.read();//takes the sensor redings and converts them to x
            distance=x;
            //if distance is == to desired distance than stop left and right wheels 
            stopvalue = .033
            if(x>stopvalue){
                
                left.speed(.5);
                right.speed(.5);
                
                }else{
                    left.stop();
                    right.stop();
                    }
            
            wait(0.1);
            pc.printf("%f\n",x);//mbed send out float values for Matlab
        }
    }
}