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Update OctalToDecimal.java #4

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16 changes: 15 additions & 1 deletion ...n/java/com/packt/datastructuresandalg/lesson1/activity/octaltodecimal/OctalToDecimal.java
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Original file line number Diff line number Diff line change
Expand Up @@ -2,6 +2,20 @@

public class OctalToDecimal {
public int convertToDecimal(String octal) {
return 999;
/*
* Given: 75532
* formula => 2*8^0 + 3*8^1
*/
// the result to be displayed
int output = 0;
// the length of the input string
int len = octal.length();

for(int i = len-1; i >= 0; i--) {
// the value of the char in integer
int num = Integer.parseInt(octal.valueOf(octal.charAt(i)));
output += (num * (int) Math.pow(8, (len-1)-i));
}
return output;
}
}