问编写一个将输入复制到输出的程序

EN

#include <stdio.h>
/* Write a program to copy its input to its output, replacing each tab by \t, each backspace by \b, and each backslash by \\. This makes tabs and backspaces visible in an unambigous way.*/

int main()
{
    char c;

    while ((c = getchar()) != EOF){

        if ((c = getchar()) == '\t'){
            putchar('\t');
        }
        if (c == '\b'){
            puts("\b");
        }
        if (c == '\\'){
            puts("\\");
        }

        putchar(c);
    }

}