If the integer cannot be stored, you can consider high-precision calculation. Simply put, it uses a character array to store values. The following is its specific definition. The so-called high-precision operation refers to an operation in which the range of numbers involved in the operation (addends, subtrahends, factors...) greatly exceeds the range that can be represented by standard data types (integers, real types). For example, find the sum of two 200-digit numbers.