convertin string to integer using atoi() function

[martin paul]

Sir please consider the following code......
int getint(char *);
int main ()
{
char name[80];
printf("enter the string\n");
scanf("%s",name);
getint(name);
}
int getint(char *ptr)
{
int x=0;
x=atoi(*ptr);
printf("%d\n",x);
}
WHEN I RUN THIS ON LINUX O/S I AM GETTING "SEGMENTATION" FAULT
COULD YOU PLEASE HELP ME WITH THE PROBLEM
THANK YOU...

[Banfa]

You are passing the wrong parameter type to atoi, if you where to include the correct headers the compiler would pick up this mistake for you.

[Savage]

Char *ptr represent's ur string so it's simmiliar to ptr[].When u want to print whole array u don't specify array element instead u put it like ptr.The same is with this pointer.So:

x=atoi(ptr);

should work.


Savage

[jesusdiehard]

try atoi(ptr) instead of atoi(*ptr)

[askcq]

that works fine for ascii to integer conversion...
example ...if the sting is "123"
and not "123abc"

even I need to know how to convert a string to integer and vice versa

[weaknessforcats]

The string 123abc is not an integer.

[martin paul]

Hello Sir ...I've changed the code as you suggested. If I am giving input string as "martin" the output is zero for me....Could there be any problem in the code...
Please help me !!

[Banfa]

Hello Sir ...I've changed the code as you suggested. If I am giving input string as "martin" the output is zero for me....Could there be any problem in the code...
Please help me !!

What did you expect it to output? The string "martin" contains no digits, therefore the conversion to an int stops on the 'm' and the function returns 0.

[martin paul]

Sir Could you tell me what actually atoi(const char *) fuction does if possible with an example....
Thank you..

[martin paul]

Sir suppose lets take two strings string 1 and string 2
string1="arun"
string2="1234"
In the memory wouldnt the accii values of each character be stored..

[Savage]

Sir Could you tell me what actually atoi(const char *) fuction does if possible with an example....
Thank you..

Atoi converts string to integer.It stop working when it comes to first invalid or '\0' character and returns 0.

Example:

string=123abc;

number=atoi(string);

number=123;

Savage

[Savage]

Sir suppose lets take two strings string 1 and string 2
string1="arun"
string2="1234"
In the memory wouldnt the accii values of each character be stored..

atoi does not convert char into it ascii decimal value and assagning it to the
number specifed.It searches for specific interval of numbers

From: 48
To: 57
,inclusive.

Savage