View difference between Paste ID: QZkQ1ELq and ZVn0kw5Y

 // Now handles two's compliment negative numbers, though I'm not convinced that it
 // handles the codes correctly, certainly not UTF-8 encoding.
 #include <stdio.h>
 #include <stdlib.h>
 #include <conio.h>
 // Forward declaration of function:
-// The \0 sequence is an escape character which I think means 'null' or end of string:
+
 // Global variables:
 static char x[2]=" \0";
 static char buffer='\0';
 static char run=0;
 static char i=0;
 // This is used as a boolean so that the negative numbers are represented
 // correctly in binary:
 static char twoscompliment=0;
-    // Clears screen and sets welcome message:
+
-    // system("cls"); works okay with Code::Blocks on Windows, but doesn't with Visual Studio
+
 static char binary[8]="00000000";
 int main()
 {
     // Clears screen and sets welcome message (system (); might not work with Visual Studio 2010
     // but is fine with Code::Blocks):
     system("cls");
     printf("Welcome to this ascii and binary conversion programme.\n");
     printf("Please enter one character only and press the ENTER key.\n");
     printf("Entering two or more characters may crash this programme,\n");
     printf("or cause unusual results! (C) MMXII Donkeysoft.\n\n");
     // Tells the main element of the program to start, ie, everything in the
     // while() loop:
     run=1;
     while(run)
     {
         // Prompts for user input and gets the first two characters entered
         // by the user and stores in x at location zero and one:
         printf("\nEnter a character (press ENTER twice to exit)\nD:\\> ");
         x[0]=getchar(); x[1]=getchar();
         // Tests for condition to exit programme:
         if(x[0]=='\n' || x[0]=='\0')
         {
             // Says goodbye and switches off boolean to run:
             printf("\nGoodbye!");
             run=0;
             return 0;
         }
         // Outputs the character's ASCII value in decimal:
         printf("Character value in decimal: %d\n",x[0]);
         // Tests for negative numbers:
         if(x[0]<0)
         {
-                if(a)
+            twoscompliment=1;
             x[0]=x[0]+1;
         }
         else
             {
                 twoscompliment=0;
             }
         // Sets each bit as appropriate:
         for(i=8;i>0;i=i-1)
             {
                 // Stores the remainder of x[0] modulo 2 into a, so it will be
                 // either 1 or zero, and then divides x[0] by 2:
                 a=x[0]%2;
                 x[0]=x[0]/2;
                 // Tests to see if a is true or not:
                 if(a && !twoscompliment)
                 {
                     binary[i-1]='1';
                 }
                 else
                     if (!a && !twoscompliment)
                     {
                         binary[i-1]='0';
                     }
                 else
                     if (a && twoscompliment)
                     {
                         binary[i-1]='0';
                     }
                 else
                     if (!a && twoscompliment)
                     {
                         binary[i-1]='1';
                     }
             }
             // Now will output the contents of the character array called binary
             // as a string, containing ones and zeros for each bit set:
             printf("Character value in binary: %s\n",binary);
             if(twoscompliment)
             {
                 printf("This is in two's compliment.\n");
             }
             printf("This reads as follows:\n");
             a=0;
             for(i=8; i>0; i=i-1)
             {
                 printf("Bit %d is ",a);
                 if(binary[i-1]=='1')
                 {
                     printf("TRUE\n");
                 }
                 else
                     {
                         printf("FALSE\n");
                     }
                 a=a+1;
             }
     }
 }