Question

How to input all char in printf

Answer 1

printf() prints on the standard output (console).

scanf() reads from the standard output (console).

What exactly are you after?

Printing all the characters from the ASCII table:

    for (int i = 0; i < 256; i++)
        printf("%c", i);

Reading any character (to be exact reading a character string):

    char buffer[256];
    scanf("%s", buffer);
    printf("String read: %s\n", buffer);