Question: Program in C: 3 (15 Points) Write a main program that reads characters from the terminal and writes characters on the screen. Your program must
Program in C:

3 (15 Points) Write a main program that reads characters from the terminal and writes characters on the screen. Your program must use getchar) to read and putchar() to write. If the character read is not a letter, it is printed unchanged If the character is an upper case letter, print the letter in lower case. If the character is a lower case letter, print the letter in upper case
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