From 18b8726791c5fd3181edda73416f6ddaf302c321 Mon Sep 17 00:00:00 2001 From: justanothercatgirl Date: Wed, 18 Sep 2024 17:15:55 +0300 Subject: 2 versions now --- main1.c | 59 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 59 insertions(+) create mode 100644 main1.c (limited to 'main1.c') diff --git a/main1.c b/main1.c new file mode 100644 index 0000000..164a8ed --- /dev/null +++ b/main1.c @@ -0,0 +1,59 @@ +#include +#include +#include +#include + +#define GEN_MAX 1000000000 + +static int tenpow(int pow) { + int base = 10; + int ret = 1; + while (pow) { + if (pow & 0b1) + ret *= base; + base *= base; + pow >>= 1; + } + return ret; +} + +static char get_at_pos(unsigned int n, int pos) { + n /= tenpow(pos); + return n % 10; +} + +int main(int argc, char *argv[]) { + srand(time(NULL)); + int arr[10] = {0}; + unsigned int gen; + + int iters, pos; + if (argc == 3) { + iters = atoi(argv[1]); + pos = atoi(argv[2]); + if (!iters || !pos) goto fail; + } else { + fputs("Iterations: ", stdout); + if (!scanf("%i", &iters)) goto fail; + fputs("Position (10^N): ", stdout); + if (!scanf("%i", &pos)) goto fail; + } + + for (int _ = 0; _ < iters; ++_) { + gen = rand() % GEN_MAX; +#ifdef PRINT_GENERATED + printf("%i\n", gen); +#endif + ++arr[get_at_pos(gen, pos)]; + } + + printf("count of numbers at position %i:\n", pos); + for (int i = 0; i < 10; ++i) + printf("\t%i: %i\n", i, arr[i]); + + return EXIT_SUCCESS; +fail: + fputs("Input a valid number\n", stderr); + return EXIT_FAILURE; +} + -- cgit v1.2.3-70-g09d2