fixed function converting binary input to decimal not working for every input

src/conversionOfNumbers/conversionOfNumbers.c

@@ -1,6 +1,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <math.h>
+#include <string.h>
 
 #include "conversionOfNumbers.h"
 
@@ -42,12 +43,12 @@ char* convertIntToBinaryStr(int input){
 
 unsigned int convertBinaryStrToInt(char* input){
     unsigned int result = 0;
-    int x = 0;
-    while(input[x] != '\0'){
-        if(input[x] == '1'){
-            result += 1 * pow(2, x);
-        }
-        x++;
+    int index = strlen(input) - 1;
+    int exponent = 0;
+    while(index >= 0){
+        if(input[index] == '1') result += 1 * pow(2, exponent);
+        index--;
+        exponent++;
     }
     return result;
 }