main(x){for(x<<=16;x--;)x&x/2&21845||putchar(~(x|x>>8)&85?32:43)&&x&255||puts("");}

main(x){for(x<<=16;x--;)x&x/2&21845||x%256*putchar((x^x>>8)&85?32:88)||puts("");}

a=[x for x in range(171)if x&x/2&85<1]
for i in a:print''.join("X "[(i^j)&85>0]for j in a)

Compiling src/main.c...
In file included from src/main.c:4:0:
inc/io.h:10:39: error: expected ';', ',' or ')' before '=' token
 char *readfile(char *path, int bufsize=4096);
                                       ^
src/main.c: In function 'main':
src/main.c:9:5: error: implicit declaration of function 'readfile' [-Werror=implicit-function-declaration]
     char *txt = readfile(argv[1]);
     ^
src/main.c:9:17: error: initialization makes pointer from integer without a cast [-Werror]
     char *txt = readfile(argv[1]);

a=[x&85for x in range(171)if x&x/2&85<1]
for i in a:print''.join("X "[i^j>0]for j in a)

»  ./akso.exe
Usage: D:\AKSO\akso.exe <file>Segmentation fault

main(x){for(x<<=16;x--;)x&x/2&21845||x%256*putchar((x^x>>8)&85?32:88)||puts("");}
main(x){for(x<<=16;x--;)x&x/2&21845||x%256*putchar(~(x|x>>8)&85?32:43)||puts("");}

src/main.c:13:44: error: invalid operands to binary % (have 'const char *' and 'char *')
         printf("Error while reading %s.\n" % argv[1]);

main(x){for(x<<=16;x--;)x&x/2&21845||x%256*putchar(x&x>>8&85?32:88)||puts("");}

»  ./akso.exe Makefile
CC=gcc
CFLAGS=-W -Wall -Werror -Wshadow -Wfloat-equal -Wundef -Wpointer-arith -Wcast-align -Wstrict-prototypes\
           -Wstrict-overflow=5 -Wwrite-strings -Waggregate-return -Wformat=2 -Werror-implicit-function-declaration\
           -Iinc -pedantic -std=c99
EXE=akso.exe

20014620: src/`
        @echo 'Compiling $<...'
        @$(CC) $(CFLAGS) -c -o obj/$@ $<

.PHONY: compile exe clean all
all: exe
        @echo 'Done!'

compile: main.o io.o

exe: compile
        @echo 'Linking to $(EXE)...'

// wat
char *readfile(char *path) {
    FILE *file = fopen(path, "r");
    if (file == NULL) return NULL;
    fseek(file, 0, SEEK_END);
    int size = ftell(file);
    fseek(file, 0, SEEK_SET);
    char *buf = malloc(size);
    int i = 0;
    char c;
    if (buf == NULL) {
        fclose(file);
        return NULL;
    }
    while ((c = fgetc(file)) != EOF) buf[i++] = c;
    buf[i] = 0;
    fclose(file);
    return buf;
}

»  ./akso.exe Makefile
CC=gcc
CFLAGS=-W -Wall -Werror -Wshadow -Wfloat-equal -Wundef -Wpointer-arith -Wcast-align -Wstrict-prototypes\
           -Wstrict-overflow=5 -Wwrite-strings -Waggregate-return -Wformat=2 -Werror-implicit-function-declaration\
           -Iinc -pedantic -std=c99
EXE=akso.exe

20014660: src/`
        @echo 'Compiling $<...'
        @$(CC) $(CFLAGS) -c -o obj/$@ $<

.PHONY: compile exe clean all
all: exe
        @echo 'Done!'

compile: main.o io.o

exe: compile
        @echo 'Linking to $(EXE)...'

20014660: src/`

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>>> def f(n):
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...  return n ** f(n - 1)
...