thepigeongenerator/coinflip
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refactor and pedantic fixes

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Quinn
2025-04-06 17:22:56 +02:00
parent 8c8386740b
commit 50964df129
1 changed files with 9 additions and 8 deletions
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17
src/main.c
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@@ -1,11 +1,12 @@
#include <errno.h> #include <errno.h>
#include <linux/time.h>
#include <stdint.h> #include <stdint.h>
#include <stdio.h> #include <stdio.h>
#include <stdlib.h> #include <stdlib.h>
#include <time.h> #include <time.h>
int main(int argc, char** argv) { int main(int argc, char** argv) {
// set thr seed to the number of seconds xor-ed with nanoseconds // set the seed to the number of seconds xor with nanoseconds
{ {
struct timespec ts; struct timespec ts;
clock_gettime(CLOCK_MONOTONIC, &ts); clock_gettime(CLOCK_MONOTONIC, &ts);
@@ -18,11 +19,11 @@ int main(int argc, char** argv) {
return 0; return 0;
} }
// if we have input; perform coinflips for those times // if we have input; perform coin flips for those times
for (uint32_t i = 1; i < argc; ++i) { for (uint32_t i = 1; i < argc; ++i) {
int n = 0; int n = 0; // contains the random data
uint32_t headsc = 0; uint32_t headsc = 0; // amount of heads
uint32_t tailsc = 0; uint32_t tailsc = 0; // amount of tails
// get the integer from the string, return 1 if an error occurred // get the integer from the string, return 1 if an error occurred
errno = 0; errno = 0;
@@ -32,14 +33,14 @@ int main(int argc, char** argv) {
return 1; return 1;
} }
// perform for the inputted count // perform for the input count
for (long j = 0; j < c; ++j) { for (long j = 0; j < c; ++j) {
if (n == 0) n = rand(); if (n == 0) n = rand(); // get a new random number if the random data ran out
(void)((n & 1) ? headsc++ : tailsc++); // increment the correct counter (void)((n & 1) ? headsc++ : tailsc++); // increment the correct counter
n >>= 1; // shift the random integer right by 1 n >>= 1; // shift the random integer right by 1
} }
// print the results // print the results of this cycle
printf("results:\n heads: %u\n tails: %u\n", headsc, tailsc); printf("results:\n heads: %u\n tails: %u\n", headsc, tailsc);
} }
} }