Add multilingual language and systems learning tracks

ceb/objectivec-practice-20261101/lesson-1/main.m

@@ -0,0 +1,14 @@
+#import <Foundation/Foundation.h>
+#include <stdio.h>
+#include <assert.h>
+
+int main(void) {
+    NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
+    NSArray *minutes = [NSArray arrayWithObjects:
+        [NSNumber numberWithInt:1], [NSNumber numberWithInt:2], [NSNumber numberWithInt:3], nil];
+    int total = 0;
+    for (NSNumber *value in minutes) total += [value intValue];
+    printf("%d\n", total);
+    [pool drain];
+    return 0;
+}