MULTITHREADING c - 读取同一文件中的多个文件

I'm new at multithreading and I'm trying to simulate banking transactions on the same current account using multithreading. Each thread reads the actions to perform from a file. The file will contain an operation for each line consisting of an integer. The main program have to create as many threads as files in the path.I'm new at multithreading and I'm trying to sim