C Program to Convert Binary into Decimal Number

Here is a source code of simple c programming language program to convert a binary number into a decimal number. This program will also convert the fractional parts.

```#include<stdio.h>
#define MAX 1000

int main()
{
long dIntegral = 0,bIntegral=0,bFractional[MAX];
long intFactor=1,remainder,i=0,k=0,flag=0;
char fraBinary[MAX];

printf("Enter any fractional binary number: ");
scanf("%s",&fraBinary);

//Separating the integral and fractional parts
while(fraBinary[i])
{

if(fraBinary[i] == '.')
flag = 1; //If dot is found start taking the fractional part.
else if(flag==0)
bIntegral = bIntegral * 10 + (fraBinary[i] -48); /* char - 48 to get the numerical value.*/
else
bFractional[k++] = fraBinary[i] -48;
i++;
}

while(bIntegral!=0){
remainder=bIntegral%10;
dIntegral= dIntegral+remainder*intFactor;
intFactor=intFactor*2;
bIntegral=bIntegral/10;
}

for(i=0;i<k;i++){
dFractional  = dFractional  + bFractional[i] * fraFactor;
fraFactor = fraFactor / 2;
}

fraDecimal = dIntegral + dFractional ;

return 0;
}
```

Output Note: I have compiled the program using FireCMD shell.