This C Program converts the given binary number into decimal. The program reads the binary number, does a modulo operation to get the remainder, multiples the total by base 2 and adds the modulo and repeats the steps.

Here is source code of the C program to covert binary number to decimal. The C program is successfully compiled and run on a Linux system. The program output is also shown below.

`/*`

`* C program to convert the given binary number into decimal`

`*/`

`#include <stdio.h>`

void main()

`{`

int num, binary_val, decimal_val = 0, base = 1, rem;

printf("Enter a binary number(1s and 0s) \n");

scanf("%d", &num); /* maximum five digits */

binary_val = num;

while (num > 0)

`{`

rem = num % 10;

decimal_val = decimal_val + rem * base;

num = num / 10 ;

base = base * 2;

`}`

printf("The Binary number is = %d \n", binary_val);

printf("Its decimal equivalent is = %d \n", decimal_val);

`}`

$ cc pgm38.c $ a.out Enter a binary number(1s and 0s) 10101001 The Binary number is = 10101001 Its decimal equivalent is = 169S

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