feat: added project files

CMakeLists.txt

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+cmake_minimum_required(VERSION 3.5)
+
+project(test LANGUAGES C)
+
+add_executable(test main.c)

main.c

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+#include <stdio.h>
+#include <stdlib.h>
+
+int get_user_input(){
+	int x = -1;
+	int ok = -1;
+	while( ok != 1){
+		/* as array values will only be >0, unsigned int is fine */
+		ok = scanf("%u", &x);
+		if(ok == EOF){
+			printf("\ncaught Ctrl+D...\n");
+			ok = 1;
+			x = 2;
+			break;
+		}
+		if(ok == 0){
+			while (fgetc(stdin) != '\n'){
+			}
+			printf("[*] give me a correct value\n");
+			break;
+		}
+		}
+	return x;
+}
+
+int lemmego(){
+	printf("[*] you wished to go, quitting...\n");
+	return EXIT_SUCCESS;
+}
+
+void print_banner(){
+	printf("+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\n"
+		"|u|l|t|i|m|a|t|e|_|a|r|r|a|y|_|h|a|n|d|l|e|r|\n"
+		"+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\n");
+}
+
+void do_magic(uint arr_len){
+	printf("[i] arr_len = %u\n", arr_len);
+	int *noice_arr = malloc(arr_len*sizeof(int));
+
+	printf("noice_arr: [ ");
+	for (int i = 0; i < arr_len; i++){
+		noice_arr[i] = i;
+		printf("%d ", noice_arr[i]);
+	}
+	printf("]\n");
+
+	printf("[*] transposing array\n");
+
+	int *ugly_arr = malloc(arr_len*sizeof(int));
+	uint helper = arr_len-1;
+	printf("ugly_arr: [ ");
+	for (int i = 0; i < arr_len; i++, helper--){
+		ugly_arr[i] = noice_arr[helper];
+		printf("%d ", ugly_arr[i]);
+	}
+	printf("]\n");
+
+	free(noice_arr);
+	free(ugly_arr);
+}
+
+int main()
+{
+	int selection, arr_len=0;
+
+	print_banner();
+
+	while ( selection != -1 ) {
+		printf("\npick a choice\n");
+		printf("9000 - do magic\n"
+		"1 - quit\n"
+		"~> ");
+
+	selection = get_user_input();
+
+	switch ( selection ) {
+		case 9000:
+			printf("[*] please gimme a natural number:\n"
+			"--> ");
+			arr_len = get_user_input();
+			if (arr_len == 0) {
+				printf("[!] array cannot have zero size, mate...\n");
+			break;
+		}
+                printf("[*] doing evil stuff\n");
+                do_magic(arr_len);
+                break;
+            case 1:
+                lemmego();
+                return 9000;
+            default:
+                printf("[x] invalid option\n");
+                selection = 0;
+                break;
+        }
+    }
+
+    return 0;
+}

testin

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+9000
+20
+1