Concatenating C style Strings Question

Hi,

I'm trying to figure out how to take the text "Say ", and combine it with the value of a float variable (99.12), so that I end up with a C style string that looks like "Say 99.12".

Does anyone know how I'd go about doing this? I would use C++ style strings but I'm trying to mod Quake 2, and basically this function accepts a C style string, like this:

void qbSynchConsole(char *);

So does anyone know what's wrong with my little example program that I made as an experiment? It crashes but I don't know why. Any help would be highly appreciated.

Code:

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

int main()
{
    char *char1 = NULL;
    char *char2 = NULL;
    float a = 99.12;
    int dec,sign;

    char1 = "Say ";
    char2 =_fcvt(a,2,&dec,&sign);

    strcat ( char1, char2 );

    cout << "char1 = " << char1;
        return 0;
}

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"Say " is a string literal. You can not (usually) write to string literals.

You need to do something like

Code:

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char char1[30] = "Say ";

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That gives you space for 29 characters plus the terminating one.

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Mats

If I'm not mistaken, in C you'd use sprintf or snprintf.

And naturally you need to have a writable string buffer large enough to hold the result.

Why not something like:

Code:

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stringstream buf;
float a = 99.12;
buf << "Say " << a;
qbSynchConsole( ( char* )buf.str( ).c_str( ) );

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