If you want to make a difference in the program, math and English are essential. Mathematics can help you to have better logical thinking and have solutions to problems, while English can help you to retrieve information and learn advanced technology, because the advanced technology of software often comes from abroad, but English is more important to read. Reading ability is enough if you don't outsource to Europe and America or enter a foreign company. There is another question. Can you write a simpler program after learning C? This is not the point. Some aspects of C are simple, but some aspects are particularly complicated, just different application scenarios, but it can be said that C can write lower-level code.