1 files changed, 36 insertions, 0 deletions
diff --git a/cbook/one_two.c b/cbook/one_two.c
new file mode 100644
index 0000000..a5bf221
--- /dev/null
+++ b/cbook/one_two.c
@@ -0,0 +1,36 @@
+/*
+*
+* Dumb program that generates prime numbers.
+*/
+#include <stdio.h>
+#include <stdlib.h>
+
+
+int is_prime(int x) {
+    for (int i=2; i<x; i++) {
+        if (x % i == 0 && i != x) return 0;
+    }
+    return 1;
+}
+
+
+
+
+int main(){
+    int this_number, prime, next_prime, next_number;
+
+    this_number = 3;
+
+    while(this_number < 10000){
+        prime = is_prime(this_number);
+        if (prime == 1) {
+            next_number = this_number + 2;
+            next_prime = is_prime(next_number);
+            if (next_prime == 1)
+                printf("%d and %d are prime pair\n", this_number, next_number);
+        }
+        this_number++;
+
+    }
+    exit(EXIT_SUCCESS);
+}