### Learning Math and Coding with Robots

 Grid: Tics Lines: Width px Hash Lines: Width px Labels: Font px Trace Lines: Robot 1: Width px Robot 2: Width px Robot 3: Width px Robot 4: Width px
 Axes: x-axis y-axis Show Grid Grid: 24x24 inches 36x36 inches 72x72 inches 96x96 inches 192x192 inches Quad: 4 quadrants 1 quadrant Hardware Units: US Customary Metric
 Background:

#### Robot 1

 Initial Position: ( in, in) Initial Angle: deg Current Position: (0 in, 0 in) Current Angle: 90 deg Wheel Radius: 1.75 in1.625 in2.0 in Track Width: in

#### Robot 2

 Initial Position: ( in, in) Initial Angle: deg Current Position: (4 in, 0 in) Current Angle: 90 deg Wheel Radius: 1.75 in1.625 in2.0 in Track Width: in

#### Robot 3

 Initial Position: ( in, in) Initial Angle: deg Current Position: (8 in, 0 in) Current Angle: 90 deg Wheel Radius: 1.75 in1.625 in2.0 in Track Width: in

#### Robot 4

 Initial Position: ( in, in) Initial Angle: deg Current Position: (12 in, 0 in) Current Angle: 90 deg Wheel Radius: 1.75 in1.625 in2.0 in Track Width: in

Count the Number of Passing Cars
Problem Statement:
The program animates a random number of cars passing. Click run and count how many cars pass and input the number when prompted.
```/* Code generated by RoboBlockly v2.0 */
/* Problem Statement:
The program animates a random number of cars passing. Click
run and count how many cars pass and input the number when
prompted.*/
#include <chplot.h>

CPlot plot;
int count;

// Describe this function...
void start() {
double randomnum;
double d;
randomnum = 5;
count = 0;
while(count < randomnum) {
for(d = -12; d <= 12; d += 0.6) {
//plot.backgroundImage("rainbow.png");
plot.noStrokeColor();
plot.fillColor("#33cc00");
plot.rectangle(-12, -12, 24, 11);
plot.fillColor("#999999");
plot.rectangle(-12, -9, 24, 6);
plot.strokeColor("white");
plot.strokeWidth(4);
plot.line(-12, -6, 12, -6);
plot.noStrokeColor();
plot.strokeWidth(2);
plot.fillColor("cyan");
plot.rectangle(d, -7, 7, 3);
plot.fillColor("#3333ff");
plot.circle(d + 2, -7, 1);
plot.circle(d + 5, -7, 1);
delaySeconds(0.03);
}
count = count + 1;
}
}

randint(2, 10);

// sample solution
printf("Please count the number of cars passed by.");
start();
printf("There should be 5");

plot.label(PLOT_AXIS_XY, "");
plot.grid(PLOT_OFF);
plot.tics(PLOT_AXIS_XY, PLOT_OFF);
plot.axis(PLOT_AXIS_XY, PLOT_OFF);
plot.axisRange(PLOT_AXIS_XY, -12, 12);
plot.ticsRange(PLOT_AXIS_XY, 2);
plot.sizeRatio(1);
plot.plotting();```
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Problem Statement:
The program animates a random number of cars passing. Click run and count how many cars pass and input the number when prompted.

Time