NAND map

nand.c

//
// NAND map
//

#include <stdio.h>
#include <stdlib.h>

static char* ToBits(long long x, char bits) {
  if (bits < 1 || bits > 64)
    return 0;
  char* ret = malloc(bits+1);
  char i;
  long long i2;
  for (i2=1LL<<bits-1,i=0; i2>0; i2>>=1,i++)
    ret[i] = (((x & i2) == i2) ? '1' : '0');
  ret[i] = 0;
  return ret;
}

void main(int argc, char** argv) {
    int res, i, i2;
    char bits = 4;
    int matrixSize = 10;
    int matrixSize2;
    if (argc > 1) {
      if ((strcmp(argv[1], "h") == 0) || (strcmp(argv[1], "-h") == 0) || (strcmp(argv[1], "/h") == 0) || (strcmp(argv[1], "help") == 0) || (strcmp(argv[1], "--help") == 0) || (strcmp(argv[1], "/help") == 0)) {
        printf("Usage:\n  nand [bits [matrix_size(1) [matrix_size2]]]\n");
        return;
      }
      bits = atoi(argv[1]);
    }
    if (argc > 2)
      matrixSize = atoi(argv[2]);
    matrixSize2 = matrixSize;
    if (argc > 3)
      matrixSize2 = atoi(argv[3]);
    for (i = 0; i < matrixSize; i++) {
      for (i2 = 0; i2 < matrixSize2; i2++) {
        res = ~(i & i2);
        printf("%i NAND %i = %i  ", i, i2, res);
        printf("(%s NAND %s = %s)  \t", ToBits(i, bits), ToBits(i2, bits), ToBits(res, bits));

        res = (i & i2);
        printf("%i AND %i = %i  ", i, i2, res);
        printf("(%s AND %s = %s)\n", ToBits(i, bits), ToBits(i2, bits), ToBits(res, bits));
      }
      if (i != matrixSize-1)
        printf("\n");
    }
}

// make.bat:
// gcc nand.c -o nand.exe -s
// nand > nand.txt