C Program to solve the 8 Queens Problem......

#include<stdio.h>
static int t[10]={-1};
void queens(int i);
int empty(int i);
void print_solution();
int main()
{
queens(1);
print_solution();
return(0);
}
void queens(int i)
{
for(t[i]=1;t[i]<=8;t[i]++)
{
if(empty(i))
{
if(i==8)
{
print_solution();
/* If this exit is commented, it will show ALL possible combinations */
exit(0);
}
else
{
// Recurse!
queens(i+1);
}
}// if
}// for
}

int empty(int i)
{
int j;
j=1;
while(t[i]!=t[j] && abs(t[i]-t[j])!=(i-j) &&j<8)j++;
return((i==j)?1:0);
}

void print_solution()
{
int i;
for(i=1;i<=8;i++)printf("\nt[%d] = [%d]",i,t[i]);
}