how to convert string into an integer in a batch file ?

c++ string visual-studio-2010 batch-file pre-build-event
user1386966 picture user1386966 · Dec 9, 2012 · Viewed 12.9k times · Source

I have this piece of batch file :

@echo off
set  xx=7
echo the version is %xx%

I wand to use it in a pre-build event in VS2010 - as an integer :

MY_INT = $(xx)

but it's value is a string , how can I convert the string value into an integer value in the batch file?

thanks!

Answer

dbenham picture dbenham · Dec 9, 2012

Environment variables (batch variables) are always strings; they cannot be stored as integers.

The SET command with the /A option can parse integral numbers from strings, perform arithmetic operations, and store the integral result in an environment variable. But the final result is still a string representation of the final number.

Type help set or set /? from a command prompt for more info about the SET /A option.

Related questions

g++ string remove_if error

Here's the code: #include <iostream> #include <string> #include <algorithm> using namespace std; int main() { string word=""; getline(cin,word); word.erase(remove_if(word.begin(), word.end(), isspace), word.end()); word.erase(remove_if(…

Read More
C++ _TCHAR* to std::string

I created a project in C++, and VS2010 created int _tmain(int argc, _TCHAR* argv[]) { string sInput; string sOutput; int iMode=0; if (argc==3) { if (strcmp(argv[0], "-e")==0) { iMode = 1; } else if (strcmp(argv[0], "-d")==0) { iMode =2; } sInput=argv[1]; sOutput=argv[2]; } } As you …

Read More
Easiest way to convert int to string in C++

What is the easiest way to convert from int to equivalent string in C++. I am aware of two methods. Is there any easier way? (1) int a = 10; char *intStr = itoa(a); string str = string(intStr); (2) int a = 10; stringstream ss; ss &…

Read More