Convert Binary String to Unsigned 32-bit Integer

Task

Implement the function bin_to_dec

• Write a function that takes a null-terminated char[] consisting of ASCII '0' and '1' characters ($\text{length}\le 32$), and returns the unsigned 32-bit integer it represents
• If the string is less than 32 characters, assume leading zeros up to 32 characters ("110" represents 6)
• The function signature

// Given a char[] of ASCII '0' and '1' (length ≤ 32), return the unsigned 32-bit integer it represents.
// If the string is shorter than 32, assume Leading 0's
void bin_to_dec(char str[]);

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Testing

Compiling

$ gcc bin_to_dec.c -o bin_to_dec
$ ./bin_to_dec

Example Uses

$ ./bin_to_dec
110
6
00000000000000000000000000000001
1
11111111111111111111111111111111
4294967295
10000000000000000000000000000000
2147483648

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Code

void bin_to_dec(char str[]) {
	int value_at_index = 1;
	int result = 0;
	size_t max_len = strlen(str);
	for (int i = max_len - 1; i >= 0; i--, value_at_index *= 2) {
		if (str[i] == '1'){
			result += value_at_index;
		}
	}
	
	printf("%u\n", result);
}

NOTE

printf("%u") → prints an unsigned integer value (%d prints signed integer value)