I'm stuck at yet another C problem. How can I concatenate two strings with the second string being inserted before the first string?
This is what I came up with. Unfortunately I'm stuck at all these pointer to chars, char arrays et cetera.
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
int main(int argc, char* argv[] )
{
char* output;
int i;
for(i = 9; i > 0; i--)
{
unsigned int value = (unsigned int)i;
char buffer[20];
sprintf(buffer, "%u", value);
// strcat(ouput, buffer); // append before the string.
// first loop: 9
// second loop: 89
// third loop: 789
}
printf("%s", output);
}
How must I correct my code to make it work? I guess I have to somehow set the output variable to empty. When do I need fixed widths for the char array or the pointer? 20 was just a random guess from me.