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convert a binary numbers to equivalent decimal number in C Language - MAKAUT / WBUT MCA 2011 - C Language
987    Arnab De    14/11/2019

Write a c program to convert a binary numbers to equivalent decimal number. [WBUT MCA 2011]

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

int main()
{
char nos[20];
int i,fl=1,res=0,temp;
printf("Enter A Numbers : ");
gets(nos);
//check for valid binary number
for(i=0;nos[i]!='\0';i++)
{
//48 and 49 is the ascii code for 0 and 1 respectively
if(nos[i] < 48 || nos[i] >  49)
{
fl=0;
break;
}
}
if(fl)
{
strrev(nos);
puts(nos);
for(i=0;nos[i]!='\0';i++)
{
temp=nos[i]-48;
res += temp * pow(2,i);
}
printf("Binary eqivalent of %s is %d",nos,res);
}
else
{
printf("!!! *** INVALID BINARY NUMBER *** !!!");
}
}
```

Output

======

Enter A Numbers : 1011

Binary eqivalent of 1101 is 11

Difference between Structure and Class - MAKAUT / WBUT MCA Slove
Author Details
Arnab De
I have over 16 years of experience working as an IT professional, ranging from teaching at my own institute to being a computer faculty at different leading institute across Kolkata. I also work as a web developer and designer, having worked for renowned companies and brand. Through tutorialathome, I wish to share my years of knowledge with the readers.
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