使用 python 将输入发送到可执行文件

Question

I have an executable C code binary which asks for 2 inputs. And I want to write a python code which gives the input automatically. What i mean is when i run python code.py |./ones-and-zeroes . It give inputs to the executable. I tried using print(INPUT) but it only works if the input asked in next line, not in same line. Here is image

As you can see in image, I want to give -1 as first input, and something in second input.

I tried:

print(-1)
print(something)

a bit more brief is- i wrote:
print(1)
print(2)
print(3)

it worked here because the input asked in new line
but it did not work for other executable because input is asking input in the same line.

i may not be clear here, sorry. I simply want to input: -1 in the first question(How long is your secret:) and input: test or some string in second question(Enter your secret:). However i want to do it using python code. not manually

Edit: I don't have the exact C code, however i managed to reverse engineer it and here is something which might help.

void getFlag(void)
{
    ushort secret_len;
    char your_secret[1936];

    printf("\nHow long is your secret: ");
    __isoc99_scanf(&DAT_0804a0dc,&secret_len);

    if(1927 < (short)secret_len) {
        puts("\nYour Secret is too long");
         exit(0);
    }

    printf("\nEnter your secret: ");
    getchar();
    fgets(your_secret, (uint)secret_len, stdin);
    puts("\nThe Enclave will shield your secrets!\n");
    return;
}

Thanks everyone for help:)

Answer 1

If you know all of the information you want to print on a single line there are a variety of ways to format up the multiple values on a single line of output. One option to get -1 and then the contents of the something variable on a single line would be to use "f-strings"

print(f'-1 {something}')

Basically you can put any python code into curly braces and its string representation will be substituted into the string, and then the entire string will be printed with a newline at the end.

If you want to do multiple prints to the same line because you don't know all of your output at once, you need to use sys.stdout.write and then include an explicit '\n' when you really do need to write the newline.

Answer 2

I did not understand your problem well, but if you mean to use input and take a value in the same line, you can use this code

x=int(input("How long is your secret:")
y=input("Enter your secret:")