Aeria Language Compiler

// The Aeria Programming Language Compiler
// Note* Compiles to Brainf*** in a textfile
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>

int main(int argc, char *argv[]){
    // The file handling section
    if(argc < 3){
        printf("\nCorrect usage is: abfc <source.txt> <output.txt>\n");
        exit(8); // Exit program
    }
    FILE *file;
    file = fopen(argv[1], "r"); // Read the file to file...
    int p, size;
    p = size = 0; // Set stuff equal to zero
    char c; // Current char beind read
    if(file == NULL){
        printf("\nInput file could not be opened!\n");
        exit(8); // Exit the program
    }
    fseek(file, 0, SEEK_END);
    size = ftell(file);
    fseek(file, 0, SEEK_SET);
    char input[size]; // Set up the input for proper size
    while((c=fgetc(file)) != EOF)
        input[p++] = (char) c; // Read in the file
    fclose(file); // Close the file, we have the input array
    int i, j; // Iterator
    FILE *cfile; // output file
    cfile = fopen(argv[2], "a+");
    for(i = 0; input[i] != 0; i++){ // Go through 1 command at a time
        c = input[i];
        if(isdigit(c)){
            for(j = 0; j < (atoi(&c)); j++)
                fprintf(cfile, "+");
        }
        else if(c == '%')
            fprintf(cfile, "-");
        else if(c == '*')
            fprintf(cfile, ">");
        else if(c == '/')
            fprintf(cfile, "<");
        else if(c == '$') // get input
            fprintf(cfile, ",");
        else if(c == '#') // print current char
            fprintf(cfile, ".");
        else if(c == '{')
            fprintf(cfile, "[");
        else if(c == '}')
            fprintf(cfile, "]");
        else if(c == '&') // Set current register to zero
            fprintf(cfile, "[-]");
        else if(c == '^') // Rewind to the first register.
            fprintf(cfile, "<[<]");
        else{
            continue;
        }
    }
    fclose(cfile); // close out the file
    return 0;
}

/* ============================================================================= */

/* Language Specification */

/*
Well, It's a simple programming language.

{       // Brackets for loops (while loop)
}       // Brackets for loops (while loop)
*       // Move pointer 1 unit right
/       // Move pointer 1 unit left
$       // Get 1 char of input and save it current byte
#       // Print out current character.
<number>    // Increase current value of pointer by <number>
%       // Decrease current value of pointer by 1
&       // Set current register back to zero
^       // Rewind to frist empty register.
@       // Print out all non zero registers, until it hits a zero.
*/