Interested to Buy Any Domain ? << Click Here >> for more details...
Write an implementation of “float stringToFloat(char *str).”
The code should be simple, and not require more than the
basic operators (if, for, math operators, etc.).
• Assumptions
• Don’t worry about overflow or underflow
• Stop at the 1st invalid character and return the number
you have converted till then, if the 1st character is
invalid return 0
• Don’t worry about exponential (e.g. 1e10), instead you
should treat ‘e’ as an invalid character
• Write it like real code, e.g. do error checking
• Go though the string only once
• Examples
• “1.23” should return 1.23
• “1a” should return 1
• “a”should return 0
- 6 Answers
- 10790 Views
- Qualcomm, I also Faced
- E-Mail Answers
Answers were Sorted based on User's Feedback
Answer / piyush sharma
#include<iostream>
using namespace std;
int main()
{
char* str = "36.78sg67";
char ch;
int decimal_pt = 0;
int dec_count = 0;
float val = 0.0;
for( int i=0; str[i]!='\0'; i++ )
{
ch = str[i];
if( ch == '.' )
{
decimal_pt = 1;
continue;
}
if( !(ch>=48 && ch<=57) )
break;
val = val*10 + ch-48;
if( decimal_pt == 1 )
dec_count++;
}
for( int i=0; i<dec_count; i++ )
val = val/10;
cout << val << endl;
system("pause");
return 0;
}
| Is This Answer Correct ? | 3 Yes | 1 No |
Answer / piyush sharma
float stringToFloat(char *str)
{
char ch;
int decimal_pt = 0;
int dec_count = 0;
float val = 0.0;
for( int i=0; str[i]!='\0'; i++ )
{
ch = str[i];
if( ch == '.' )
{
decimal_pt = 1;
continue;
}
if( !(ch>=48 && ch<=57) )
break;
val = val*10 + ch-48;
if( decimal_pt == 1 )
dec_count++;
}
for( int i=0; i<dec_count; i++ )
val = val/10;
return val;
}
| Is This Answer Correct ? | 2 Yes | 2 No |
Answer / nikita
The above two solutions do not take care of the numberes
after the decimal.
for eg; "123.78" would return 123.0000 instead it should
return 123.78.
| Is This Answer Correct ? | 1 Yes | 1 No |
Answer / c l
float stringToFloat(char *str)
{
float retVal = 0;
float devisor = 1;
int strSize = sizeof(str);
int multiplySign = 1;
bool foundDecimal = false;
/* check for non empty char array */
if (strSize > 0 )
{
if (str[0] >= '0' && str[0] <= '9')
retVal = str[0] - '0';
else if (str[0] == '.')
foundDecimal = true;
else if (str[0] == '-')
mulitplySign = -1;
else if (str[0] == '+')
; /* NOP */
else
return retVal;
for (i = 1; i < strSize; i++)
{
if (str[i] >= '0' && str[i] <= '9')
{
retValue = retValue*10 + str[i] - '0';
if (foundDecimal)
divisor = divisor * 10;
}
else if (str[i] == '.')
if(foundDecimal) /* 2nd '.', err */
break;
else
foundDecimal = true;
else /* anything else is err cond */
break;
}
return multiplySign * retVal / divisor;
}
}
| Is This Answer Correct ? | 0 Yes | 0 No |
Answer / fernando
If I have character buffer with many floats and want to
separate it as I do?
Example:
for (uint8_t i = 0; i < n; i++)
{
buf [i]; 25.45, 26.54,...
}
buf[0]=
buf[1]=
.
.
.
buf[n]=
Thanks.
| Is This Answer Correct ? | 0 Yes | 0 No |
Answer / nikita
#include<stdio.h>
#include<string.h>
int main()
{
int i = 0;
float result = 0;
int dec_count = 0;
int isDec = 0;
char* str = "123.76bg";
while(str[i])
{
if(str[i] == '.')
{
isDec = 1;
i++;
}
if((str[i]>=48) && (str[i]<=57))
{
result = result * 10;
result = result + (str[i++] - '0');
}
else
{
break;
}
if(isDec == 1)
{
dec_count++;
}
}
printf("\nThe result is: %f", result);
for(i=0; i<dec_count; i++)
{
result = result / 10;
}
printf("\nThe result is: %f", result);
return 0;
}
| Is This Answer Correct ? | 1 Yes | 2 No |
I was asked to write a program in c which when executed displays how many no.of clients are connected to the server.
write a c program to convert fahrenheit to celsius?
write a program using linked list in which each node consists of following information. Name[30] Branch Rollno Telephone no i) Write the program to add information of students in linked list
write an algorithm to get a sentence and reverse it in the following format: input : I am here opuput: Here Am I note: first letter of every word is capiatlised
What is scope and lifetime of a variable in c?
What are the uses of a pointer?
What is variable declaration and definition in c?
WAP to convert text into its ASCII Code and also write a function to decode the text given?
implement OR gate without using any bitwise operator.
What is the real difference between arrays and pointers?
27 Answers Hexaware, Logic Pro, TCS,
Why is sprintf unsafe?
write the program for prime numbers?
73 Answers Accenture, Aptech, Infosys, TCS,
C 
