langs a-z

Task/Create-a-two-dimensional-array-at-runtime/Objective-C/create-a-two-dimensional-array-at-runtime.m

@@ -0,0 +1,28 @@
+#import <Foundation/Foundation.h>
+
+int main()
+{
+  int num1, num2, i, j;
+  NSMutableArray *arr;
+
+  NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
+  scanf("%d %d", &num1, &num2);
+
+  NSLog(@"%d %d", num1, num2);
+
+  arr = [NSMutableArray arrayWithCapacity: (num1*num2)];
+  // initialize it with 0s
+  for(i=0; i < (num1*num2); i++) [arr addObject: [NSNumber numberWithInt: 0]];
+
+  // replace 0s with something more interesting
+  for(i=0; i < num1; i++) {
+    for(j=0; j < num2; j++) {
+      [arr replaceObjectAtIndex: (i*num2+j) withObject: [NSNumber numberWithInt: (i*j)]];
+    }
+  }
+
+  // access a value: i*num2+j, where i,j are the indexes for the bidimensional array
+  NSLog(@"%@", [arr objectAtIndex: (1*num2+3)]);
+  [pool release];
+  return 0;
+}