3 files changed, 34 insertions, 0 deletions

diff --git a/mat/euler/10/Makefile b/mat/euler/10/Makefile
new file mode 100644
index 0000000..20eb4bf
--- /dev/null
+++ b/mat/euler/10/Makefile
@@ -0,0 +1,2 @@
+default:
+	gcc -pedantic prog.c -lm
diff --git a/mat/euler/10/a.out b/mat/euler/10/a.out
new file mode 100755
index 0000000..9a7b171
--- /dev/null
+++ b/mat/euler/10/a.out
diff --git a/mat/euler/10/prog.c b/mat/euler/10/prog.c
new file mode 100644
index 0000000..ca82ccc
--- /dev/null
+++ b/mat/euler/10/prog.c
@@ -0,0 +1,32 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+int jePrastevilo(int u) {
+	if (u <= 1) // idk trebše je reku da 1 ni praštevilo, pomoje se sicer laže
+		return 0; // we fucked up, ne bom delal za negativne številke
+	if (u == 2)
+		return 1;
+	for (int i = 2; i <= ceil(sqrt(u)); i++)
+		if (u % i == 0)
+			return 0;
+	return 1;
+}
+int main (int argc, char ** argv) {
+	if (argc != 1+1) {
+		fprintf(stderr, "uporaba: %s <do katerega števila>\nprimer: %s 1000000\n", argv[0], argv[0]);
+		return 1;
+	}
+	int u = atoi(argv[1]);
+	unsigned long long int s = 0;
+	if (u < 1) {
+		fprintf(stderr, "minimalno število je 1!\n");
+		return 2;
+	}
+	while (u > 1) { // js srepo zaupam žoržu, da 1 ni praštevilo.
+		if (jePrastevilo(u))
+			s = s+u;
+		u--;
+	}
+	fprintf(stdout, "konec. seštevek je %lld.\n", s);
+	return 0;
+}