string find

**twans** · 08-31-2005

heyas,

if anyone could enlighten me as to why this is not acting as intended i'd be greatly apprecitive

it is *meant* to store the following

vector index 0: assume
vector index 1: nothing
vector index 2: expect
vector index 3: anything

what it is _actually_ storing is the following:

vector index 0: assume
vector index 1: nothing expect
vector index 2: expect anything
vector index 3: anything

also, i recieve different still results from using cin>>paramCommand;

any ideas why using cin would give different results to my static string in the example below?

i'm very keen to get on the top of both of these issues, thanks in advance.

Code:

int index = 0;
int loc = 0;

/*keep iterating through string until the end
using spaces as delimiter's */

paramCommand = "assume nothing expect anything";

while(loc <= paramCommand.length()) {
loc = paramCommand.find(" ", index);
command.push_back(paramCommand.substr(index, loc));
index = loc+1;
}

**manannan** · 08-31-2005

The second parameter to basic_string::substr() is the length of the substring, not the position of the last character. Perhaps you should use it like this?

Code:

command.push_back(paramCommand.substr(index, loc - index + 1));

**twans** · 08-31-2005

fantastic, thanks for the help

any ideas when i call

cin >> paramCommand;

it does not function?

**hk_mp5kpdw** · 08-31-2005

A stringstream would be easier to use (IMO) in this instance:

Code:

#include <vector>
#include <string>
#include <sstream>

...

std::vector<std::string> command;
std::string paramCommand = "assume nothing expect anything";
std::string temp;

// Initialize stringstream using 'paramCommand' string
std::stringstream sstr(paramCommand);

// Extract individual strings from stringstream (uses spaces by default) and push onto vector
while(sstr >> temp)
    command.push_back(temp);

**ZuK** · 08-31-2005

Originally Posted by twans

fantastic, thanks for the help

any ideas when i call

cin >> paramCommand;

it does not function?

cin >> paramCommand; stops when it finds a space. use getline instead.
Kurt

**twans** · 09-01-2005

thanks heaps guys.

very helpful

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