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#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <string.h>
#include <limits.h>
int coinFlip (int times);
int
main (int argc, char *argv[])
{
int nflag = 0, times = 1, i, tails, heads;
float ph, pt;
argc--;
for (i = 1; i <= argc; i++) {
if (strcmp(argv[i], "-n") == 0) {
nflag++;
} else if (strcmp(argv[i], "-m") == 0) {
times = INT_MAX;
break;
} else if (nflag == 1) {
times = atoi(argv[i]);
if (times == 0) {
printf("Non Integer Value Inputted\n");
return -1;
}
break;
}
}
if (times == 1)
printf("%s\n", coinFlip(times) ? "Heads" : "Tails");
else {
tails = coinFlip(times);
heads = times - tails;
ph = (float)heads/times;
pt = (float)tails/times;
printf("Heads: %d\nTails: %d\nProb Heads: %f\nProb Tails: %f\n", heads, tails, ph, pt);
}
return 0;
}
/* coinFlip: Flips a coin n numbers of times and returns the number of tails */
int
coinFlip (int times)
{
int tails, i, c;
time_t t;
srand((unsigned) time(&t));
for (i = tails = 0; i < times; i++) {
c = rand() % 2;
if (c == 1)
tails++;
}
return tails;
}
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