Write code for atoi(x) where x is hexadecimal string.

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Question

Write code for atoi(x) where x is hexadecimal string.

Question Submitted By :: Superhuman

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Re: Write code for atoi(x) where x is hexadecimal string.

Answer
# 1

int n=strlen(x) // where x is pointer to hex string
int sum=0;
int leftshift=0;
while(n>0)
{
  if((x[n-1]>='0') && (x[n-1]<='9'))
    sum+=(x[n-1]-'0')<<leftshift;
  if((x[n-1]>='A') && (x[n-1]<='F'))
    sum+=(x[n-1]-'A'+10)<<leftshift;
  if((x[n-1]>='f') && (x[n-1]<='f'))
    sum+=(x[n-1]-'a'+10)<<leftshift;
  n--;
  leftshift+=4;
}

Is This Answer Correct ?

2 Yes

3 No

Mohammed Sardar

Re: Write code for atoi(x) where x is hexadecimal string.

Answer
# 2

int n=strlen(x) // where x is pointer to hex string
int sum=0;
int leftshift=0;
while(n>0)
{
  if((x[n-1]>='0') && (x[n-1]<='9'))
    sum+=(x[n-1]-'0')<<leftshift;
  if((x[n-1]>='A') && (x[n-1]<='F'))
    sum+=(x[n-1]-'A'+10)<<leftshift;
  if((x[n-1]>='a') && (x[n-1]<='f'))
    sum+=(x[n-1]-'a'+10)<<leftshift;
  n--;
  leftshift+=4;
}

Is This Answer Correct ?

1 Yes

0 No

John Huang

Question	Asked @	Answers
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