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/* John Napier's Algorithm */
#include <iostream.h>
#include <conio.h>
#include <math.h>
#include <iomanip.h>
struct cards {
int sqr[2][9];
};
cards v1[10];
struct depend {
double power[2];int size[2];
};
int main() {
void create_napier_table();
void display_napier_table();
depend dependence(int f1,int f2);
int first,second,temp,first1,second1;
cout << "Creating John Napier's Table...\n";
create_napier_table();
cout << "\n\nEnter 1st no.: ";
cin >> first;
cout << "Enter 2nd no.: ";
cin >> second;
first1=first;second1=second;
if (first<second) {
temp=first;
first=second;
second=temp; }
if (first==0||second==0) { cout << "Result is 0"; getch(); exit(0); }
depend d1;
d1=dependence(first,second);
int m=d1.size[0];int n=d1.size[1];
int arr[n][m];
int n1,n2,n3,n4,i=0,j=0,row=0,coloumn=0;
while(first>0) {
n1=int (first / int (d1.power[0]));
second=second1;
while(second>0) {
n2=second%10;
v1[n1].sqr[0][n2-1]=0;
v1[n1].sqr[1][n2-1]=0;
display_napier_table();
row++;coloumn++;
second=second/10;
j+=2; }
i++;
d1.power[0]=d1.power[0]/10;
first=first1-first; }
for (int i=0;i<row;i++) { cout << "\n";
for (int j=0;j<coloumn;j++)
cout << arr[j][i] << "\t";
}
getch();
}
/* Napier's Table */
void create_napier_table() {
int card_no=0;
int no,c,d,count=0;
for (int i=0;i<10;i++,card_no++) { no=1;
for (int k=0;k<9;k++,no++,count++) {
d=c=card_no*no;
if (c<10) {
v1[i].sqr[0][k]=0;
v1[i].sqr[1][k]=c; }
else {
c=c/10;
v1[i].sqr[0][k]=c;
d=d%10;
v1[i].sqr[1][k]=d; }
}
}
system("cls");
}
//Depencence
depend dependence(int f1,int f2) {
int a=0,b=0;
double c,d;
depend d2;
while(f1>0) { f1=f1/10; a++; }
while(f2>0) { f2=f2/10; b++; }
c=pow(10,(a-1));
d=pow(10,(b-1));
d2.size[0]=a;
d2.size[1]=b;
d2.power[0]=c;
d2.power[1]=d;
return (d2);
}
void display_napier_table() {
cout << "\t\t\tJohn Napier's Multiplication table\n";
cout << "\n ===========================================================================";
cout << "\n0 0";
for (int i=1;i<=9;i++)
cout << setw(8) << i;
cout << "\n ===========================================================================";
for (int i=0;i<9;i++) { cout << "\n";
cout << i+1 << " ";
for (int j=0;j<10;j++)
cout << v1[j].sqr[0][i] << v1[j].sqr[1][i] << " |\t";
cout << " ---------------------------------------------------------------------------"; }
}
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