3 files changed, 119 insertions, 0 deletions

diff --git a/mat/euler/17/Makefile b/mat/euler/17/Makefile
new file mode 100644
index 0000000..dff62a0
--- /dev/null
+++ b/mat/euler/17/Makefile
@@ -0,0 +1,4 @@
+default:
+	gcc -I. prog.c -pedantic -lm
+libtest:
+	gcc -I. angnum.c -pedantic -lm
diff --git a/mat/euler/17/a.out b/mat/euler/17/a.out
new file mode 100755
index 0000000..e04ac3d
--- /dev/null
+++ b/mat/euler/17/a.out
diff --git a/mat/euler/17/angnum.c b/mat/euler/17/angnum.c
new file mode 100644
index 0000000..5c5f890
--- /dev/null
+++ b/mat/euler/17/angnum.c
@@ -0,0 +1,115 @@
+#pragma once
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+/* definiramo jezik - ZAČETEK */
+#define J_0			"zero"
+#define J_1			"one"
+#define J_2			"two"
+#define J_3			"three"
+#define J_4			"four"
+#define J_5			"five"
+#define J_6			"six"
+#define J_7			"seven"
+#define J_8			"eight"
+#define J_9			"nine"
+#define J_10		"ten"
+#define J_11		"eleven"
+#define J_12		"twelve"
+#define J_13		"thirteen"
+#define J_14		"fourteen"
+#define J_15		"fiveteen"
+#define J_16		"sixteen"
+#define J_17		"seventeen"
+#define J_18		"eighteen"
+#define J_19		"nineteen"
+#define J_20		"twenty"
+#define J_30		"thirty"
+#define J_40		"forty"
+#define J_50		"fifty"
+#define J_60		"sixty"
+#define J_70		"seventy"
+#define J_80		"eighty"
+#define J_90		"ninety"
+#define J_1h		"hundred"
+#define J_1k		"thousand"
+#define J_1M		"million"
+#define J_1G		"billion"
+#define J_1T		"trillion"
+#define J_AND		"and"
+#define J_EMPTY	""
+/* definiramo jezik - KONEC */
+#define MX_NS_L	1337 
+/* angnum : size_t (število zapisanih bajtov, -1 ob propadu sveta)
+ *	n: lluint: številka, ki naj jo zapišemo
+ *	s: pointer to allocatanega spomina, kamor zapišemo string
+ *	l: število bajtov allocatanega spomina za string, IZključno zadnjega '\0'
+ * alocirati morate vsaj en bajt več od l
+ * string bo mogoče avtomatsko null terminiran, vseeno ga raje dajte še sami */
+char * j_enice[] = { J_EMPTY, J_1, J_2, J_3, J_4, J_5, J_6, J_7, J_8, J_9, J_10, J_11, J_12, J_13, J_14, J_15, J_16, J_17, J_18, J_19, J_20 };
+char * j_power[] = { J_EMPTY, J_1k, J_1M, J_1G, J_1T };
+char * j_desetice[] = { J_EMPTY, J_10, J_20, J_30, J_40, J_50, J_60, J_70, J_80, J_90 };
+
+unsigned long long int na(unsigned long long int a, unsigned long long int b) {
+	unsigned long long int c = 1; /* jebeš math.h ke nima funkcije za intager */
+	for (; b > 0; b--) {					/* potenciranje															*/
+		c = c * a;
+	}
+	return c;
+}
+
+size_t angnum (unsigned long long int n, char * s, int l) {
+	unsigned int i = 0; // Index Iteracij
+	int z = 0; // Zapisanih
+	if (n <= 20) { // "thirteen", namesto 0 je prazen string 
+		z = snprintf(s, l, "%s", j_enice[n]);
+		fprintf(stderr, "z = %d, l = %d, s = %s, n = %llu\n", z, l, s, n);
+		return z;
+	}
+	if (n <= 99) { // && n > 20 // "forty-one" ali "thirty"
+		z = snprintf(s, l, "%s", j_desetice[n / 10]); // intdiv je floor
+		if (z < l && n % 10 != 0) s[z++] = '-';
+		return z + (n % 10 != 0 ? snprintf(s+z, l-z, "%s", j_enice[n % 10]) : 0);
+	}
+ 	if (n <= 999) { // && n > 99
+		z = snprintf(s, l, "%s ", j_enice[n/100]); // "one "
+		z = z + snprintf(s+z, l-z, "%s", J_1h); // "hundred"
+		if (n % 100 != 0) {
+			if (z < l) s[z++] = ' ';
+			z = z + snprintf(s+z, l-z, "%s ", J_AND); // "and "
+			return z + angnum(n-(n/100)*100, s+z, l-z);
+		} else {
+			return z;
+		}
+	} // sedaj je n > 99 && n < 1e21
+	for (i = 3; i <= 21; i=i+3) // sedaj iščemo največjo tisočico
+		if (n / na(10, i) <= 999) // zadnja tisočica
+			break;
+	z = angnum((n/na(10, i)), s, l-z); // "three hundred and forty-two"
+	fprintf(stderr, "-z = %d, l = %d, s = %s, n = %llu\n", z, l, s, n);
+	z = z + snprintf(s+z, l-z, " %s", j_power[i/3]); // "million"
+	fprintf(stderr, "xz = %d, l = %d, s = %s, n = %llu\n", z, l, s, n);
+	if (n-(n/na(i, 10)) > 0) {
+		fprintf(stderr, "pz = %d, l = %d, s = %s, n = %llu\n", z, l, s, n);
+		if (z < l) s[z++] = ' ';
+		if (z < l) s[z++] = 'a';
+		if (z < l) s[z++] = 'n';
+		if (z < l) s[z++] = 'd';
+		if (z < l) s[z++] = ' ';
+		fprintf(stderr, "qz = %d, l = %d, s = %s, n = %llu\n", z, l, s, n);
+		z = z + angnum(n-(n/na(10, i)*na(10, i)), s+z, l-z);
+		fprintf(stderr, "zz = %d, l = %d, s = %s, n = %llu\n", z, l, s, n);
+	}
+	return z;
+}
+int main (int argc, char ** argv) {
+	if (argc != 1+1) {
+		fprintf(stderr, "uporaba: %s <stevilka>\nprimer, ki napiše \"four hundred and twenty\": %s 420\n", argv[0], argv[0]);
+		return 1;
+	}
+	unsigned long long int n = strtoll(argv[1], NULL, 10);
+	char * s = malloc(sizeof(char)*MX_NS_L);
+	s[angnum(n, s, MX_NS_L-1)] = '\0';
+	fprintf(stdout, "%s\n", s);
+	return 0;
+}