Mutual recursion: Difference between revisions
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System.out.println(m(i)); |
System.out.println(m(i)); |
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} |
} |
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}</lang> |
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=={{header|Objective-C}}== |
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Basically for Objective-C is valid what stated for C. In this code we show the use of two class method; this works since we need an <tt>interface</tt> block that is like declaration of functions in C code. |
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<lang objc>#import <objc/Object.h> |
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@interface Hofstadter : Object |
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+ (int)M: (int)n; |
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+ (int)F: (int)n; |
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@end |
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@implementation Hofstadter |
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+ (int)M: (int)n |
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{ |
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if ( n == 0 ) return 0; |
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return n - [self F: [self M: (n-1)]]; |
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} |
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+ (int)F: (int)n |
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{ |
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if ( n == 0 ) return 1; |
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return n - [self M: [self F: (n-1)]]; |
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} |
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@end |
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int main() |
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{ |
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int i; |
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for(i=0; i < 20; i++) { |
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printf("%3d ", [Hofstadter F: i]); |
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} |
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printf("\n"); |
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for(i=0; i < 20; i++) { |
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printf("%3d ", [Hofstadter M: i]); |
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} |
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printf("\n"); |
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return 0; |
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}</lang> |
}</lang> |
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