Interested to Buy Any Domain ? << Click Here >> for more details...
Write code for atoi(x) where x is hexadecimal string.
- 5 Answers
- 26400 Views
- Adobe, I also Faced
- E-Mail Answers
Answers were Sorted based on User's Feedback
Answer / john huang
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 ? | 7 Yes | 3 No |
Answer / mohammed sardar
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 ? | 10 Yes | 7 No |
Hi,
Refer below link to know how atoi() lib fuction works.
http://www.cppreference.com/wiki/c/string/atoi
And find the equalent code which i have written here.
#include<stdio.h>
#include<conio.h>
int MyAtoi(char *cptr);
main()
{
/*Give different inputs like "12.3432", "a4523"," 123"
"abcd", "1234f" and find the qualent output*/
char *cptr = "123445";
printf("INTEGER EQU IS: %d\n", MyAtoi(cptr));
getch();
}
int MyAtoi(char *cptr)
{
int iptr = 0;
while((*cptr != '\0') && ((*cptr >= 48 && *cptr <= 57) ||
(*cptr == 32)))
{
if(*cptr != ' ')
iptr = (iptr * 10) + (*cptr - 48);
cptr++;
}
return iptr;
}
| Is This Answer Correct ? | 3 Yes | 0 No |
Answer / audrius
long l = strtol(string, NULL, 16);
//or, if you need unsigned (which you usually do with hexes)
unsigned long ul = strtoul(string, NULL, 16);
| Is This Answer Correct ? | 1 Yes | 0 No |
Explain the use of 'auto' keyword in c programming?
What is the use of void pointer and null pointer in c language?
Which built-in library function can be used to match a patter from the string?
Give a one-line C expression to test whether a number is a power of 2. [No loops allowed - it's a simple test.]
for questions 14,15,16,17 use the following alternatives:a.int b.char.c.string.d.float
write a reverse string to print a stars.(with out using logic) ***** **** *** ** *
What is a void * in c?
What is the difference between static and global variables?
Why dont c comments nest?
When should structures be passed by values or by references?
How to write a program for machine which is connected with server for that server automatically wants to catch the time for user of that machine?
what is the difference between auto and static keywords
1 Answers cDot, College School Exams Tests, TCS,
C 
