Re: converting string into integer


priyanka wrote:

Hi there,

I want to convert a String into integer.

I get the string froma file using :

string argNum;
getline(inputStream,argNum);

What is this getline function you're speaking of ?

I now need to convert argNum into integer.

I tried to use

int a = atoi(argNum);

But I got errot message :error: cannot convert `std::string' to `const
char*' for argument `1' to `int atoi(const char*)'

Since this std::string thingy is not C you were bound to get an error.
By the way , C++ questions should be asked at comp.lang.c++

And for the getline function, the argNum must be a string variable.

Can anyone please tell me how to convert argNum into integer ?

If argNum is pointer to char , then you use atoi. In C that is.

Spiros Bousbouras

.

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