ABI compatibility in C refers to whether binary code generated by different compilers or versions can be compatible without recompilation. 1. Function calling conventions, 2. Name modification, 3. Virtual function table layout, 4. Structure and class layout are the main aspects involved.

The ranking of virtual currencies’ “oldest” is as follows: 1. Bitcoin (BTC), issued on January 3, 2009, is the first decentralized digital currency. 2. Litecoin (LTC), released on October 7, 2011, is known as the "lightweight version of Bitcoin". 3. Ripple (XRP), issued in 2011, is designed for cross-border payments. 4. Dogecoin (DOGE), issued on December 6, 2013, is a "meme coin" based on the Litecoin code. 5. Ethereum (ETH), released on July 30, 2015, is the first platform to support smart contracts. 6. Tether (USDT), issued in 2014, is the first stablecoin to be anchored to the US dollar 1:1. 7. ADA,

The best cryptocurrency trading and analysis platforms include: 1. OKX: the world's number one in trading volume, supports multiple transactions, provides AI market analysis and on-chain data monitoring. 2. Binance: The world's largest exchange, providing in-depth market conditions and new currency first-time offerings. 3. Sesame Open Door: Known for spot trading and OTC channels, it provides automated trading strategies. 4. CoinMarketCap: an authoritative market data platform, covering 20,000 currencies. 5. CoinGecko: Known for community sentiment analysis, it provides DeFi and NFT trend monitoring. 6. Non-small account: a domestic market platform, providing analysis of linkage between A-shares and currency markets. 7. On-chain Finance: Focus on blockchain news and update in-depth reports every day. 8. Golden Finance: 24 small

The login portal for the Douyin web version is https://www.douyin.com/. The login steps include: 1. Open the browser; 2. Enter the URL https://www.douyin.com/; 3. Click the "Login" button and select the login method; 4. Enter the account password; 5. Complete login. The web version provides functions such as browsing, searching, interaction, uploading videos and personal homepage management, and has advantages such as large-screen experience, multi-tasking, convenient account management and data statistics.

When using computers on a daily basis, the application of shortcut keys can significantly improve our productivity, especially when gaming or using specific software. Shortcut keys are not only convenient to operate, but also play an important role in Windows 7 system, helping us complete tasks more efficiently. Ctrl Shift N: Create a new folder. Press Ctrl Shift N in File Explorer to quickly create a new folder. If you use this shortcut key in IE9 browser, the current tab page will be opened in a new window. Ctrl Shift Double-click the left mouse button: Run the program as an administrator In Windows 7, some programs need to be run as an administrator to operate normally. The traditional method is to right-click the program icon and select

In C, the bit field is a structure member that specifies the number of bits, used to save memory and directly manipulate hardware. Example: structMyStruct{inta:2;intb:5;intc:1;}. The advantage of bit domains is memory savings, but there are cross-platform issues, access restrictions and assignments that require caution. Example of usage: structStateMachine{unsignedintpower:1;unsignedintmode:2;unsignedinterror:1;}. Performance recommendations include arranging bit fields by size, avoiding overuse and adequate testing.

Binance C2C transactions allow users to buy and sell cryptocurrencies directly, and pay attention to the risks of counterparty, payment and price fluctuations. Choosing high-credit users and secure payment methods can reduce risks.

The official Gate.io APP can be downloaded in the following ways: 1. Visit the official website gate.io to download; 2. Search "Gate.io" on the App Store or Google Play to download. Be sure to download it through the official channel to ensure safety.