putchar is a function in C language. The function of this function is to output a character to the terminal.
Format:
putchar(c)
c can be a character enclosed in single quotes, or it can be a decimal integer between 0 and 127 (including 0 and 127), It can also be a character variable defined in advance with char.
1. When c is a character enclosed in single quotes, the character is output;
2. When c is a character between 0 and 127 (including 0 and 127) When it is a decimal integer, it will be regarded as the ASCII code of the corresponding character, and the character corresponding to the ASCII code will be output;
3. When c is a character variable, the character pointed to by the variable will be output.
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