Thread: Too long string causes segmentation fault

Hello.

This simple code was nicely working:

Code:

#include <stdio.h>
#include <string.h>

int main(void)
    {
    char *source_str = "Some message here.\n";
    char str[strlen(source_str) * 2];
    int i;

    strcpy(str, source_str);

    for(i=0; i<5; i++)
        strcat(str, source_str);

    printf("%s\n", str);

    return 0;
    }

Then I made some changes in the string:

Code:

char *source_str = "Some message here."
    " Let's make it even longer."
    " Let's add another sentence.\n";

Now, when I try to run this program, system replies: "Segmentation fault"

What actually causes this an what would be the alternatives?

Thank you.