C Program Code:
#include<stdio.h>
#include<stdlib.h>
#include<math.h>
int convertToDecimal(const char binary[]);
int main()
{
char binaryNumber[17]; // 16 characters for 16-bit Binary Number and one for ''.
int decimalNumber;
printf("Binary to Decimal Converter in C \n");
printf("Enter 16-bit Binary Number : ");
scanf("%s", binaryNumber);
decimalNumber = convertToDecimal(binaryNumber);
printf("Decimal Number is %d \n", decimalNumber);
printf("Press enter to continue... \n");
fflush(stdin);
getchar();
return 0;
}
int convertToDecimal(const char binaryNumber[])
{
const char *binaryString = binaryNumber;
int length = 0;
int decimalNumber = 0;
int base = 2; // Base Of Binary Number
int i;
// Find length of Binary Number
for (; *binaryString != '\0'; binaryString++)
{
length++;
}
// Find Decimal Number
binaryString = binaryNumber;
for (i = 0; *binaryString != '\0' && i < length; i++, binaryString++)
{
if (*binaryString == '0')
{
// Multiplying by zero, equal to zero. So you can discard statement written below.
decimalNumber += 0 * pow(base, length - i - 1);
}
else if (*binaryString == '1')
{
decimalNumber += 1 * pow(base, length - i - 1);
}
else
{
printf("Invalid Binary Number \n");
printf("Binary Number Contains only 0's or 1's \n");
printf("Press enter to continue... \n");
fflush(stdin);
getchar();
exit(0);
}
}
return decimalNumber;
}
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