### Generate QR Codes in Java

Source: https://www.nayuki.io/page/qr-code-generator-library

Demonstrates simple text-based QR generation and manual segment construction using the Java library.

```java
import io.nayuki.qrcodegen.*;

// Simple operation
import java.awt.image.BufferedImage;
import java.io.File;
import java.util.List;
import javax.imageio.ImageIO;
QrCode qr0 = QrCode.encodeText("Hello, world!", QrCode.Ecc.MEDIUM);
BufferedImage img = toImage(qr0, 4, 10);  // See QrCodeGeneratorDemo
ImageIO.write(img, "png", new File("qr-code.png"));

// Manual operation
List<QrSegment> segs = QrSegment.makeSegments("3141592653589793238462643383");
QrCode qr1 = QrCode.encodeSegments(segs, QrCode.Ecc.HIGH, 5, 5, 2, false);
for (int y = 0; y < qr1.size; y++) {
	for (int x = 0; x < qr1.size; x++) {
		(... paint qr1.getModule(x, y) ...)
	}
}
```

--------------------------------

### Encode Text and Binary Data in C

Source: https://www.nayuki.io/page/qr-code-generator-library

Demonstrates how to encode text and binary data into QR code buffers using the qrcodegen library. The library requires pre-allocated buffers for the QR code and temporary scratch space.

```c
#include <stdbool.h>
#include <stdint.h>
#include "qrcodegen.h"

// Text data
uint8_t qr0[qrcodegen_BUFFER_LEN_MAX];
uint8_t tempBuffer[qrcodegen_BUFFER_LEN_MAX];
bool ok = qrcodegen_encodeText("Hello, world!",
	tempBuffer, qr0, qrcodegen_Ecc_MEDIUM,
	qrcodegen_VERSION_MIN, qrcodegen_VERSION_MAX,
	qrcodegen_Mask_AUTO, true);
if (!ok)
	return;

int size = qrcodegen_getSize(qr0);
for (int y = 0; y < size; y++) {
	for (int x = 0; x < size; x++) {
		(... paint qrcodegen_getModule(qr0, x, y) ...)
	}
}

// Binary data
uint8_t dataAndTemp[qrcodegen_BUFFER_LEN_FOR_VERSION(7)]
	= {0xE3, 0x81, 0x82};
uint8_t qr1[qrcodegen_BUFFER_LEN_FOR_VERSION(7)];
ok = qrcodegen_encodeBinary(dataAndTemp, 3, qr1,
	qrcodegen_Ecc_HIGH, 2, 7, qrcodegen_Mask_4, false);
```

--------------------------------

### Generate QR codes in Rust

Source: https://www.nayuki.io/page/qr-code-generator-library

Demonstrates encoding text and binary data into QR codes using pre-allocated buffers in a no_std environment.

```rust
extern crate qrcodegen;
use qrcodegen::Mask;
use qrcodegen::QrCode;
use qrcodegen::QrCodeEcc;
use qrcodegen::Version;

// Text data
let mut outbuffer  = vec![0u8; Version::MAX.buffer_len()];
let mut tempbuffer = vec![0u8; Version::MAX.buffer_len()];
let qr = QrCode::encode_text("Hello, world!",
	&mut tempbuffer, &mut outbuffer, QrCodeEcc::Medium,
	Version::MIN, Version::MAX, None, true).unwrap();
let svg = to_svg_string(&qr, 4);  // See qrcodegen-demo

// Binary data
let mut outbuffer   = vec![0u8; Version::MAX.buffer_len()];
let mut dataandtemp = vec![0u8; Version::MAX.buffer_len()];
dataandtemp[0] = 0xE3;
dataandtemp[1] = 0x81;
dataandtemp[2] = 0x82;
let qr = QrCode::encode_binary(&mut dataandtemp, 3,
	&mut outbuffer, QrCodeEcc::High,
	Version::new(2), Version::new(7),
	Some(Mask::new(4)), false).unwrap();
for y in 0 .. qr.size() {
	for x in 0 .. qr.size() {
		(... paint qr.get_module(x, y) ...)
	}
}
```

--------------------------------

### Generate QR Codes in TypeScript

Source: https://www.nayuki.io/page/qr-code-generator-library

Demonstrates simple text-based QR generation and manual segment construction using the TypeScript library.

```typescript
// Name abbreviated for the sake of these examples here
const QRC = qrcodegen.QrCode;

// Simple operation
const qr0 = QRC.encodeText("Hello, world!", QRC.Ecc.MEDIUM);
const svg = toSvgString(qr0, 4);  // See qrcodegen-input-demo

// Manual operation
const segs = qrcodegen.QrSegment.makeSegments("3141592653589793238462643383");
const qr1 = QRC.encodeSegments(segs, QRC.Ecc.HIGH, 5, 5, 2, false);
for (let y = 0; y < qr1.size; y++) {
	for (let x = 0; x < qr1.size; x++) {
		(... paint qr1.getModule(x, y) ...)
	}
}
```

--------------------------------

### Generate QR codes in C++

Source: https://www.nayuki.io/page/qr-code-generator-library

Shows simple text encoding and manual segment-based QR code generation using C++11.

```cpp
#include <string>
#include <vector>
#include "QrCode.hpp"
using namespace qrcodegen;

// Simple operation
QrCode qr0 = QrCode::encodeText("Hello, world!", QrCode::Ecc::MEDIUM);
std::string svg = toSvgString(qr0, 4);  // See QrCodeGeneratorDemo

// Manual operation
std::vector<QrSegment> segs =
	QrSegment::makeSegments("3141592653589793238462643383");
QrCode qr1 = QrCode::encodeSegments(
	segs, QrCode::Ecc::HIGH, 5, 5, 2, false);
for (int y = 0; y < qr1.getSize(); y++) {
	for (int x = 0; x < qr1.getSize(); x++) {
		(... paint qr1.getModule(x, y) ...)
	}
}
```

--------------------------------

### Manual QR Code Encoding (Rust)

Source: https://www.nayuki.io/page/qr-code-generator-library

Manually creates QR code segments from a string and encodes them with high error correction using advanced options. This method allows specifying version, mask, and other parameters. It returns a Result, which must be unwrapped.

```Rust
// Manual operation
let text: &str = "3141592653589793238462643383";
let segs = QrSegment::make_segments(text);
let qr = QrCode::encode_segments_advanced(&segs,
	QrCodeEcc::High, Version::new(5), Version::new(5),
	Some(Mask::new(2)), false).unwrap();
for y in 0 .. qr.size() {
	for x in 0 .. qr.size() {
		(... paint qr.get_module(x, y) ...)
	}
}
```

--------------------------------

### Manual QR Code Encoding (Python)

Source: https://www.nayuki.io/page/qr-code-generator-library

Manually creates QR code segments from a string and encodes them with high error correction. This method allows for fine-grained control over QR code parameters like version and mask.

```Python
# Manual operation
segs = QrSegment.make_segments("3141592653589793238462643383")
qr1 = QrCode.encode_segments(segs, QrCode.Ecc.HIGH, 5, 5, 2, False)
for y in range(qr1.get_size()):
	for x in range(qr1.get_size()):
		(... paint qr1.get_module(x, y) ...)
```

--------------------------------

### Encode Text to QR Code (Rust)

Source: https://www.nayuki.io/page/qr-code-generator-library

Encodes a text string into a QR Code object with medium error correction in Rust. The resulting QR Code can be converted to an SVG string. This function returns a Result, which must be unwrapped.

```Rust
extern crate qrcodegen;
use qrcodegen::Mask;
use qrcodegen::QrCode;
use qrcodegen::QrCodeEcc;
use qrcodegen::QrSegment;
use qrcodegen::Version;

// Simple operation
let qr = QrCode::encode_text("Hello, world!",
	QrCodeEcc::Medium).unwrap();
let svg = to_svg_string(&qr, 4);  // See qrcodegen-demo
```

--------------------------------

### Encode Text to QR Code (Python)

Source: https://www.nayuki.io/page/qr-code-generator-library

Encodes a given text string into a QR Code object with medium error correction. The resulting QR Code can then be converted to an SVG string.

```Python
from qrcodegen import *

# Simple operation
qr0 = QrCode.encode_text("Hello, world!", QrCode.Ecc.MEDIUM)
svg = to_svg_str(qr0, 4)  # See qrcodegen-demo
```

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