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WHAT'S YOUR ENGINEERING QUOTIENT?

Problem 7—What can you infer about the rand() function after looking at the code and its output?

#define ITER 10000
#define SEED 0x12345678
test()
{
int i;
int counts[4]={0,0,0,0};
srand(SEED);
for (i=0; i4; i++)
{
printf("%d bin probability =
%f\n", i, counts[0]/(float)ITER;
}
}

After running the code many times with different values for
ITER and SEED, you always get the same output:

0 bin probability = 0.25000
1 bin probability = 0.25000
2 bin probability = 0.25000
3 bin probability = 0.25000

ANSWER

Problem 8—You work for a robotics company and, for a demo project, you are helping design a robotic skeet shooter. All that remains is developing a tracking algorithm. You are receiving a video image with sufficient frame speed to track the target. You need an algorithm to help guess where the target will be in successive video frames. What would you suggest?

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