weird two dimensional array

Hi guys,

I am very new to C.I simply cannot understand how the following code works.

Code:

---

#include <stdio.h>
#include <conio.h>
#include <string.h>
int map(char c);
void main(){
char link[8][15]={"AB5C2D3","BA5C4E3","CA2B4E4","DA3","EB3C4"};
int adj[4][4],i,j,m,n;
printf("%s\n",link[0]);
printf("%s\n",link[1]);
printf("%s\n",link[2]);
printf("%s\n",link[3]);
printf("%s\n",link[4]);

for(i=0;i<5;i++){
for(j=0;j<5;j++){
adj[i][j]=0;
}
}

printf("After\n");
printf("%s\n",link[0]);
printf("%s\n",link[1]);
printf("%s\n",link[2]);
printf("%s\n",link[3]);
printf("%s\n",link[4]);
}

---

I get the output as

Quote:

---

AB5C2D3
BA5C4E3
CA2B4E4
DA3
EB3C4
After
BA5C4E3
CA2B4E4
DA3
EB3C4

---

Can somebody pl explain wat happens to link[0] after the initialization to the array adj[][].
Thanks in advance.

the initialization of adj has a buffer overrun, overwriting memory, presumably link[0].

actually, that would just result in a blank line, but it's undefined behavior, so it doesn't really matter.

Thank you robwhit.
Wat can I do to avoid this buffer overrun.
That is to retain the value of link[0].

Code:

---

for(i=0;i<4;i++){
    for(j=0;j<4;j++){
        adj[i][j]=0;
    }
}

---

http://faq.cprogramming.com/cgi-bin/...&id=1043284376

Thanks once again robwhit.
It worked.
This one almost drove me crazy.
Thank u very much.