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Computer science
subject: C programing
4.Define a function to appends str2[a]-str2 to str1, then test the function in main function. For example: Please input str1:abcde Please input str2:123456 Please input a,b:2,4 After joining, str1 is "abcde345” (a,b is the start and end index, the result is to append str2[a]- str2 to str1. 66 Answer