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### Programming Exercises

1. Devise a function min(x,y) that returns the smaller of two double values, and test the function with a simple driver.

2. Devise a function chline(ch,i,j) that prints the requested character in columns i through j. Test it in a simple driver.

3. Write a function that takes three arguments: a character and two integers. The character is to be printed. The first integer specifies the number of times that the character is to be printed on a line, and the second integer specifies the number of lines that are to be printed. Write a program that makes use of this function.

4. The harmonic mean of two numbers is obtained by taking the inverses of the two numbers, averaging them, and taking the inverse of the result. Write a function that takes ...

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