7-src

I used different source files in different languages so this file cannot be compiled.

First I made a hexdump of the contents of the file provided in the image. I found a suspicious
string of characters. Later, I found that it had a `=` in the end, so maybe it was a base64
encoded string. It was, but it looked like garbage. I did some googling
(well, some duckduckgoing) and found that there was a language called pikalang. It turned out it
was exactly like brainfuck but with different syntax. Now the only thing needed was to convert the
pikalang program to a brainfuck program,
then to a C program, then compile and execute. But, the first time I did this it didn't work because
a while loop didn't match with anything. It was weird that the first thing the program did
was printing, so I tried reversing the order of the instructions. Everything works! Done.

// pikalang to brainfuck transpiler, in reverse order (in cpp)
#include <bits/stdc++.h>
using namespace std;

int main() {
    char s[10];
    vector<char> out;
    while (scanf("%s", s) != -1) {
        if (strcmp(s, "pipi") == 0) out.push_back('>');
        else if (strcmp(s, "pichu") == 0) out.push_back('<');
        else if (strcmp(s, "pi") == 0) out.push_back('+');
        else if (strcmp(s, "ka") == 0) out.push_back('-');
        else if (strcmp(s, "pikachu") == 0) out.push_back('.');
        else if (strcmp(s, "pikapi") == 0) out.push_back(',');
        else if (strcmp(s, "pika") == 0) out.push_back('[');
        else if (strcmp(s, "chu") == 0) out.push_back(']');
        /*
        if (strcmp(s, "pipi") == 0) printf(">");
        else if (strcmp(s, "pichu") == 0) printf("<");
        else if (strcmp(s, "pi") == 0) printf("+");
        else if (strcmp(s, "ka") == 0) printf("-");
        else if (strcmp(s, "pikachu") == 0) printf(".");
        else if (strcmp(s, "pikapi") == 0) printf(",");
        else if (strcmp(s, "pika") == 0) printf("[");
        else if (strcmp(s, "chu") == 0) printf("]");
        */
    }
    reverse(out.begin(), out.end());
    for (auto c : out) {
        printf("%c", c);
    }
    printf("\n");
}

// brainfuck to C transpiler (in rust)
use std::io::stdin;
use std::io::Read;

fn main() {
    let mut code = String::from(r#"#include <stdio.h>
int main()
{
int buffer[1024] = {0};
int *ptr = buffer;
"#);

    for c in stdin().bytes() {
        match c.unwrap() as char {
            '+' => code.push_str("(*ptr)++;\n"),
            '-' => code.push_str("(*ptr)--;\n"),
            '>' => code.push_str("ptr++;\n"),
            '<' => code.push_str("ptr--;\n"),
            '[' => code.push_str("while(*ptr) {\n"),
            ']' => code.push_str("}\n"),
            '.' => code.push_str("putchar(*ptr);\n"),
            ',' => code.push_str("*ptr = getchar();\n"),
            _ => (),
        }
    }

    code.push_str(r#"
return 0;
}
"#);
    println!("{}", code);
}