sample.c

#include <stdio.h>

int num = 0;
int times = 0;

void check(int list[]) {
    int sum = 0;
    int product = 1;

    for(int i = 0; i < 9; ++i) {
        sum += list[i];
        product *= list[i];
    }

    if(sum == 45 && product == 362880) {
    	for(int i = 0; i < 9; ++i) {
    		printf("%d", list[i]);
    	}
    	printf("\n");
        ++num;
    }
}

void gen(int list[]) {
    for(int val0 = 1; val0 <= 9; ++val0) {
        list[0] = val0;
    for(int val1 = 1; val1 <= 9; ++val1) {
    	list[1] = val1;
    for(int val2 = 1; val2 <= 9; ++val2) {
    	list[2] = val2;
    for(int val3 = 1; val3 <= 9; ++val3) {
    	list[3] = val3;
    for(int val4 = 1; val4 <= 9; ++val4) {
    	list[4] = val4;
    for(int val5 = 1; val5 <= 9; ++val5) {
    	list[5] = val5;
    for(int val6 = 1; val6 <= 9; ++val6) {
    	list[6] = val6;
    for(int val7 = 1; val7 <= 9; ++val7) {
    	list[7] = val7;
    for(int val8 = 1; val8 <= 9; ++val8) {
        list[8] = val8;
        check(list);
        ++times;
    }}}}}}}}}
}

int main(int argc, char *argv[]) {
    int list[] = {1,1,1,1,1,1,1,1,1};
    gen(list);
    printf("(num, times) = (%d, %d)\n", num, times);
}