I want to write a program that counts occurances of characters in C# [closed]

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I want to write a program with 5 integer values/variables that will be entered by user at run-time, the program should count the number of co-occurrences of each value/total number of times each value is enter. This program is easy if written with arrays but I have to write it using case statements only. Any help?

来源：https://stackoverflow.com/questions/66103924/i-want-to-write-a-program-that-counts-occurances-of-characters-in-c-sharp