Description: Please write the function fun,, function is the function: string array will be placed in the M-string (the length of each string of not more than N), merged in order to form a new string. Function fun statement given for reference only. For example, the string array of M string AAAA BBBBBBB CC is the combined contents of the string should be: AAAABBBBBBCC. Tip: strcat (a, b) function is a character string b string copied to the tail, a new string. Note: some of the source file exists in the file PROG1.C. The data in the data file IN.DAT not modify. Do not change main function and other functions in any content, only the braces in the function fun fill a number of statements you write.
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prog1.c