Exercise 1-10

We can use if-statements to detect and print escape sequences for the characters in question.

    #include <stdio.h>
    
    main()
    {
        int c;
    
        while ((c = getchar()) != EOF) {
            if (c == '\t')
                printf("\\t");
            if (c == '\b')
                printf("\\b");
            if (c == '\\')
                printf("\\\\");
        }
    }

Now we have to account for all the other characters. We can do this using a series of nested-if-statements that ensure that our character is not one we want to replace, and then print it:

    #include <stdio.h>
    
    main()
    {
        int c;
    
        while ((c = getchar()) != EOF) {
            if (c == '\t')
                printf("\\t");
            if (c == '\b')
                printf("\\b");
            if (c == '\\')
                printf("\\\\");
            if (c != '\t')
                if (c != '\b')
                    if (c != '\\')
                        putchar(c);
        }
    }

Note: you can enter a backspace character in bash or zsh by hitting the key combination Ctrl-V + Ctrl-H.