Initial commit: Pi calculation benchmark with 34 languages

- Added implementations for: bash, brainfuck, c, cpp, crystal, csharp, d, dart, elixir, erlang, fortran, go, haskell, java, javascript, julia, kotlin, objective-c, scala, typescript, lua, nim, odin, perl, php, python, r, ruby, rust, swift, zig, assembly, vimscript, wolfram
- All implementations use Machin's formula: π/4 = 4*arctan(1/5) - arctan(1/239)
- Build system with ./build.sh, test system with ./test.sh
- Performance testing with ./run_all.sh
- Comprehensive README.md explaining performance differences
- Test framework verifies correctness against known π values

objective-c/cmd/build.sh

@@ -0,0 +1,23 @@
+#!/bin/bash
+
+# Objective-C Build Script
+
+SCRIPT_DIR="$(cd "$(dirname "$0")/.." && pwd)"
+cd "$SCRIPT_DIR"
+
+echo "=== Objective-C Build ==="
+echo ""
+
+# Kompilera Objective-C-programmet med GMP
+gcc -framework Foundation -I/opt/homebrew/opt/gmp/include -L/opt/homebrew/opt/gmp/lib -o bin/print_hej src/print_hej.m -lgmp
+
+if [ $? -eq 0 ]; then
+    echo "✓ Kompilering lyckades!"
+    echo "Binär: bin/print_hej"
+    echo ""
+    echo "För att köra:"
+    echo "  ./bin/print_hej [decimaler]"
+else
+    echo "✗ Kompilering misslyckades!"
+    exit 1
+fi

objective-c/cmd/test.sh

@@ -0,0 +1,19 @@
+#!/bin/bash
+
+# Objective-C Test Script
+
+SCRIPT_DIR="$(cd "$(dirname "$0")/.." && pwd)"
+cd "$SCRIPT_DIR"
+
+echo "=== Objective-C Test ==="
+echo ""
+
+# Testa pi-beräkning med olika antal decimaler
+for decimals in 1 2 5 10 100; do
+  result=$(./bin/print_hej $decimals 2>/dev/null)
+  if [ $? -eq 0 ]; then
+    echo "✓ $decimals decimaler: $result"
+  else
+    echo "✗ $decimals decimaler misslyckades"
+  fi
+done

objective-c/src/print_hej.m

@@ -0,0 +1,124 @@
+// Pi calculation using Machin's formula
+// pi/4 = 4*arctan(1/5) - arctan(1/239)
+
+#import <Foundation/Foundation.h>
+#include <gmp.h>
+
+// Calculate arctan(1/x) using Taylor series with arbitrary precision
+// arctan(1/x) = 1/x - 1/(3*x^3) + 1/(5*x^5) - ...
+void arctan(mpz_t result, unsigned long x, unsigned long decimals) {
+    mpz_t scale, term, x_squared, temp;
+    mpz_init(scale);
+    mpz_init(term);
+    mpz_init(x_squared);
+    mpz_init(temp);
+    
+    // scale = 10^(decimals + 10)
+    mpz_ui_pow_ui(scale, 10, decimals + 10);
+    
+    // x_squared = x * x
+    mpz_ui_pow_ui(x_squared, x, 2);
+    
+    // term = scale / x
+    mpz_fdiv_q_ui(term, scale, x);
+    
+    // result = 0
+    mpz_set_ui(result, 0);
+    
+    int sign = 1;
+    unsigned long n = 1;
+    
+    while (mpz_cmp_ui(term, 0) > 0) {
+        // result += sign * term / n
+        mpz_fdiv_q_ui(temp, term, n);
+        if (sign > 0) {
+            mpz_add(result, result, temp);
+        } else {
+            mpz_sub(result, result, temp);
+        }
+        
+        // term = term / x²
+        mpz_fdiv_q(term, term, x_squared);
+        
+        n += 2;
+        sign = -sign;
+    }
+    
+    mpz_clear(scale);
+    mpz_clear(term);
+    mpz_clear(x_squared);
+    mpz_clear(temp);
+}
+
+// Calculate pi using Machin's formula
+NSString* calculatePi(int decimals) {
+    if (decimals < 1) {
+        decimals = 100;
+    }
+    
+    mpz_t arctan5, arctan239, pi;
+    mpz_init(arctan5);
+    mpz_init(arctan239);
+    mpz_init(pi);
+    
+    // Machin's formula: pi/4 = 4*arctan(1/5) - arctan(1/239)
+    arctan(arctan5, 5, decimals);
+    arctan(arctan239, 239, decimals);
+    
+    // pi = 16*arctan(1/5) - 4*arctan(1/239)
+    mpz_mul_ui(arctan5, arctan5, 16);
+    mpz_mul_ui(arctan239, arctan239, 4);
+    mpz_sub(pi, arctan5, arctan239);
+    
+    // Convert to string
+    char* piStr = mpz_get_str(NULL, 10, pi);
+    NSString* result = [NSString stringWithUTF8String:piStr];
+    free(piStr);
+    
+    // Format output
+    if (decimals == 0) {
+        return @"3";
+    }
+    
+    // Pad with zeros if needed
+    NSString* padded = result;
+    if ([result length] < decimals + 1) {
+        NSUInteger zerosNeeded = decimals + 1 - [result length];
+        padded = [@"0" stringByPaddingToLength:zerosNeeded withString:@"0" startingAtIndex:0];
+        padded = [padded stringByAppendingString:result];
+    }
+    
+    // Insert decimal point
+    NSString* beforeDecimal = [padded substringWithRange:NSMakeRange(0, 1)];
+    NSString* afterDecimal = [padded substringWithRange:NSMakeRange(1, [padded length] - 1)];
+    
+    // Pad or truncate to desired length
+    if ([afterDecimal length] < decimals) {
+        afterDecimal = [afterDecimal stringByPaddingToLength:decimals withString:@"0" startingAtIndex:0];
+    } else {
+        afterDecimal = [afterDecimal substringWithRange:NSMakeRange(0, decimals)];
+    }
+    
+    mpz_clear(arctan5);
+    mpz_clear(arctan239);
+    mpz_clear(pi);
+    
+    return [NSString stringWithFormat:@"%@.%@", beforeDecimal, afterDecimal];
+}
+
+int main(int argc, const char* argv[]) {
+    @autoreleasepool {
+        int decimals = 100;
+        
+        if (argc > 1) {
+            decimals = atoi(argv[1]);
+            if (decimals < 1) {
+                decimals = 100;
+            }
+        }
+        
+        NSString* pi = calculatePi(decimals);
+        printf("%s\n", [pi UTF8String]);
+    }
+    return 0;
+}