#include <stdio.h>
 #include <math.h>
 int binary_decimal(char *);
 int main(int argc, char **argv)
 /* Declare data types*/
 {
 if (strcmp(argv[1], "dec")) {
     if (strcmp(argv[2], "bin")) {
    binary_decimal();
          }}
 }
 /* Other if statements for number systems to come*/
 int binary_decimal(char *n)
 /* Function to convert binary to decimal.*/
 {
    char bin; int dec = 0;
    while (bin != 'n') {
    sscanf (argv[3],"%d",&num);
    if (bin == '1') dec = dec * 2 + 1;
    else if (bin == '0') dec *= 2; }
    printf("%dn", dec);
 }