1.  // Sudoku
2. 
3.
4.  #include<stdio.h>
5.  #include<stdlib.h>
6.  #include<time.h>
7.  #include<iostream>
8.  #define MAX_FILES 10
9.  #define MAX_COLUMNES 10
10.
11. using namespace std;
12.
13.
14. int suma(int);
15.
16. //factorial sum
17. int suma(int dimensions){
18.
19.   if (dimensions<2) return dimensions;
20.      return dimensions+suma(dimensions-1);
21.
22.  }
23.
24.
25. void main(){
26.
27.      double a[MAX_ROWS][MAX_COLUMNS];
28.  	int dimensions=0;
29.      int i,j;
30.      int rows, columns;
31.    	int q;
32.   	int k;
33.	
34.  rows=0;
35.  columns=0;
36.  dimensions=0;
37.  i=0;j=0;k=0;
38.
39.  srand(time(0));
40.
41.
42.
43.  cout <<"How many cloumns and rows are there in the sudoku? (put the value 3 times, 44.  please):\n";
45.    cin >> rows >> columns >> dimensions;
46.
47.
48. q=rows/2;
49.
50.
51.
52.   while ((a[i][k]=!suma(dimensions))||(a[k][j]=!suma(dimensions))){
53.
54.
55.
56.    //first box
57.   do{
58.       for (i=0;i<q;i++){
59.           for(j=0;j<q;j++){
60.              a[i][j]=(rand()%dimensions)+1;
61.              }
62.	   }
63.
64.   }while ((a[i][j])=!suma(dimensions));
65.  
66.
67.    //second box
68.    do{
69.       for (i=(q-1);i<rows;i++){
70.           for(j=0;j<q;j++){
71.             a[i][j]=(rand()%dimensions)+1;
72.             }
73.	   }
74.   }while ((a[i][j])=!suma(dimensions));
75.
76.
77.    //third box
78.   do{
79.       for (i=0;i<q;i++){
80.           for(j=(q-1);j<columns;j++){
81.             a[i][j]=(rand()%dimensions)+1;
82.             }
83.	   }
84.   }while ((a[i][j])=!suma(dimensions));
85.
86.
87.    //fourth box
88.   do{
89.       for (i=(q-1);i<rows;i++){
90.           for(j=(q-1);j<columns;j++){
91.             a[i][j]=(rand()%dimensions)+1;
92.             }
93.	   }
94.   }while ((a[i][j])=!suma(dimensions));
95.
96.
97.  if ((a[i][k]==suma(dimensions))&&(a[k][j]==suma(dimensions))) {
98.       break;
99.   }
100.
101.
102.
103.
104.
105.
106.
107.
108.
109.
110. }
111.
112. // All sudoku is showed
113.  for (i=0;i<rows;i++){
114.       for(j=0;j<columns;j++){
115.			cout <<""<< a[i][j] <<endl;
116.		}
117.  }
118.
119.
120.}

// Sudoku
 
#include<stdio.h>
#include<fstream>
#include<stdlib.h>
#include<time.h>
#include<iostream>
#define MAX_FILES 10
#define MAX_COLUMNES 10
 
using namespace std;
 
void main(){
  int a[MAX_FILES][MAX_COLUMNES];
  int i=0;
  int j=0;
  int dimensions=4;
  int rows=4;
  int columns=4; 
 
// Initialization
for (i=0;i<rows;i++){
           for(j=0;j<columns;j++){
              a[i][j]=0;
              }
}
 
 
time_t seconds;
srand((unsigned)time(&seconds));
 
 
while(((a[0][0]+a[0][1]+a[0][2]+a[0][3])!=10)||((a[1][0]+a[1][1]+a[1][2]+a[1][3])!=10)||((a[2][0]+a[2][1]+a[2][2]+a[2][3])!=10)||((a[3][0]+a[3][1]+a[3][2]+a[3][3])!=10)||((a[0][0]+a[1][0]+a[2][0]+a[3][0])!=10)||((a[0][1]+a[1][1]+a[2][1]+a[3][1])!=10)||((a[0][2]+a[1][2]+a[2][2]+a[3][2])!=10)||((a[0][3]+a[1][3]+a[2][3]+a[3][3])!=10)||((a[0][0]+a[0][1]+a[1][0]+a[1][1])!=10)||((a[2][0]+a[2][1]+a[3][0]+a[3][1])!=10)||((a[0][2]+a[0][3]+a[1][2]+a[1][3])!=10)||((a[2][2]+a[2][3]+a[3][2]+a[3][3])!=10)){ 
 
	for (i=0;i<rows;i++){
           for(j=0;j<columns;j++){
              a[i][j]=(rand()%dimensions)+1;
              }
}
 
if(((a[0][0]+a[0][1]+a[0][2]+a[0][3])==10)&&((a[1][0]+a[1][1]+a[1][2]+a[1][3])==10)&&((a[2][0]+a[2][1]+a[2][2]+a[2][3])==10)&&((a[3][0]+a[3][1]+a[3][2]+a[3][3])==10)&&((a[0][0]+a[1][0]+a[2][0]+a[3][0])==10)&&((a[0][1]+a[1][1]+a[2][1]+a[3][1])==10)&&((a[0][2]+a[1][2]+a[2][2]+a[3][2])==10)&&((a[0][3]+a[1][3]+a[2][3]+a[3][3])==10)&&((a[0][0]+a[0][1]+a[1][0]+a[1][1])==10)&&((a[2][0]+a[2][1]+a[3][0]+a[3][1])==10)&&((a[0][2]+a[0][3]+a[1][2]+a[1][3])==10)&&((a[2][2]+a[2][3]+a[3][2]+a[3][3])==10)){
 
 
cout <<"First box"<<endl;
cout <<""<< a[0][0] <<endl;
cout <<""<< a[0][1] <<endl;
cout <<""<< a[1][0] <<endl;
cout <<""<< a[1][1] <<endl;
cout <<"----------------"<<endl;
cout <<"Second box"<<endl;
cout <<""<< a[2][0] <<endl;
cout <<""<< a[2][1] <<endl;
cout <<""<< a[3][0] <<endl;
cout <<""<< a[3][1] <<endl;
cout <<"----------------"<<endl;
cout <<"Thirth box"<<endl;
cout <<""<< a[0][2] <<endl;
cout <<""<< a[0][3] <<endl;
cout <<""<< a[1][2] <<endl;
cout <<""<< a[1][3] <<endl;
cout <<"----------------"<<endl;
cout <<"Fourth box"<<endl;
cout <<""<< a[2][2] <<endl;
cout <<""<< a[2][3] <<endl;
cout <<""<< a[3][2] <<endl;
cout <<""<< a[3][3] <<endl;
cout <<"----------------"<<endl;
 
         }
}
 
}