BIN to DEC

[4w7X92yv]

Hello

I looked all over the internet looking for a program that converts a BINARY value (01111100) to a DECIMAL value (124).
Can someone help me whit the code plz?
I don't know how to start

Best Regards
Joriek

[kbw]

Did you try Google?

http://www.wikihow.com/Convert-from-Binary-to-Decimal

[Moschops]

Set total to zero.

Start at binary digit on the far right: multiply it by one, add to the total
One to the left: multiply it by two, add to the total
One to the left: multiply it by four, add to the total
One to the left: multiply it by eight, add to the total
One to the left: multiply it by sixteen, add to the total
...
...

and so on until you've done all the binary digits.

[4w7X92yv]

I know how to convert it on paper, but i have to program it, idk how to do that

[naderST]

http://en.wikipedia.org/wiki/Binary_numeral_system#Decimal

Probably the easiest way to do that in C/C++ is treating 1111100 as a string (char array). Like this:

#include <stdio.h>
#include <string.h>
#include <math.h>

int bin2dec(const char* binary)
{
    int len,dec=0,i,exp;

    len = strlen(binary);
    exp = len-1;

    for(i=0;i<len;i++,exp--)
        dec += binary[i]=='1'?pow(2,exp):0;
    return dec;
}

int main()
{
    printf("%d\n",bin2dec("01111100"));

    return 0;
}

There should be another more efficient way to do this but with this you could have an idea.

[Moschops]

Do you know how to get an individual digit from the binary value?

[4w7X92yv]

@moschops no i don't

[4w7X92yv]

@naderST
how can i change it so i can input the value that should be converted?
thanks

[naderST]

Are you kidding? Have you ever made a hello world program on C at least? scanf, gets both functions are used to read from standard input stream. (CONSOLE)

[Moschops]

You need to learn some C++ first.

http://www.cplusplus.com/doc/tutorial/