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could you tell me how can i convet a string to integer??

#include <iostream>
#include <string>
using namespace std;

int main(){
int integer;
string buffer("123456789");

integer = buffer.substr(2, 4); // how to store the number as integer??

return 0;
}

Thanks a lot~

news.hku.hk wrote:

> int integer;
> string buffer("123456789");
>
> integer = buffer.substr(2, 4); // how to store the number as integer??

Save the substring into a string and then convert string into integer.
See the faq [38.2] How do I convert a std::string to a number?:

http://www.parashift.com/c++-faq-lit....html#faq-38.2

news.hku.hk schrieb:
> could you tell me how can i convet a string to integer??
>

stdlib:
int atoi ( const char * string );


Convert string to integer.
Parses string interpreting its content as a number and returns an int
value.




#include<iostream>
#include<string>

using namespace std;

int main () {
int integer;
string buffer = "123456789";
cout << "String:" << buffer << endl;
integer=atoi(buffer.c_str());
cout << "Integer:" << integer << endl;
return 0;
}

marbac wrote:

> news.hku.hk schrieb:
>
>> could you tell me how can i convet a string to integer??
>>
>
> stdlib:
> int atoi ( const char * string );

long atol(const char *nptr);
double atof(const char *nptr);

- Use these two functions in case you are looking for a long or a
double (instead of an int).

HTH

--
Rakesh Kumar
** Remove nospamplz from my email address for my real email **