```1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 ``` ```#define N 8 #include #include #include bool a[8] = {true}; // 1 to 8 bool b[16] = {true}; // 2 to 16 bool c[16] = {true}; // -7 to 7 int x[8]; // 1 to 8 // for i = 1 to 8 do a[ i] = true; // for i = 2 to 16 do b[ i] = true; // for i = -7 to 7 do c[ i] = true; void trythis(int i, bool q) { int j; j = 0; do { j = j + 1; q = false; if (a[ j] and b[ i + j] and c[ i - j]) { x[ i ] = j; a[ j ] = false; b[ i + j] = false; c[ i - j] = false; if (i < 8) { trythis( i + 1, q); if not q { a[ j] = true; b[ i + j] = true; c[ i - j] = true; } } else q = true } } while not q or (j not= 8); ) void eightqueen1(void); { int i; bool q; trythis( 1, q); if q then for (i = 1; i < 9; i++) { printf("%4d ", x[ i]); } printf("\n"); } int main() // driver program to test above function { eightqueen1(); return 0; } ```
 ```1 2 3 4 5 6 7 8 9 10 11 ``` ```In function 'trythis': Line 25: error: expected ')' before 'and' Line 34: error: expected '(' before 'not' Line 34: error: 'not' undeclared (first use in this function) Line 34: error: (Each undeclared identifier is reported only once Line 34: error: for each function it appears in.) Line 43: error: expected ';' before '}' token Line 45: error: expected '(' before 'not' Line 46: error: expected statement before ')' token Line 56: error: expected '(' before 'q' Line 69: error: expected declaration or statement at end of input ```