/*
* Filename: makeMultTableCPP.cpp
*
* Print a multiplication table.
*
* Compile: cl /EHsc makeMultTableCPP.cpp
* Execute: makeMultTableCPP 230 5100
*
* Date: 2009/03/07
* Author: pkim (AT) scripts.pe.kr
*/
#include <iostream>
#include <string>
#include <cmath>
using namespace std;
void printUsing();
void printMultTable(int x, int y);
int main(int argc, char *argv[]) {
long x, y;
if (argc >= 3) {
x = atoi(argv[1]);
y = atoi(argv[2]);
cout << endl;
printMultTable(x, y);
}
else {
printUsing();
}
}
void printUsing() {
cout << "Using: makeMultTable [number1] [number2]" << endl;
cout << "Print a multiplication table for the given two integers." << endl;
}
void printMultTable(int x, int y) {
char strX[80];
char strY[80];
char strZ[80];
char strT[80];
char zeros[80];
char whites[80];
char bars[80];
char line1[80];
char line2[80];
char line3[80];
char line4[80];
char loffset[20];
char buf[80];
long nx = (x >= 0) ? x : - x;
long ny = (y >= 0) ? y : - y;
int ntail1 = 0;
int ntail2 = 0;
while (nx % 10L == 0L) {
nx = nx / 10L;
ntail1++;
}
while (ny % 10L == 0L) {
ny = ny / 10L;
ntail2++;
}
long z = nx * ny;
sprintf(strZ, "%ld", z);
sprintf(strX, "%ld", nx);
sprintf(strY, "%ld", ny);
int n = strlen(strY);
strcpy(zeros, "0000000000000000000000000000000000000000");
strcpy(whites, " ");
strcpy(bars, "----------------------------------------");
strcpy(loffset, " ");
sprintf(line4, "%s%ld", loffset, nx*ny);
strncpy(buf, zeros, ntail1 + ntail2);
buf[ntail1 + ntail2] = '\0';
strcat(line4, buf);
strcpy(line1, loffset);
strncpy(buf, whites, strlen(strZ) - strlen(strX));
buf[strlen(strZ) - strlen(strX)] = '\0';
strcat(buf, strX);
strcat(line1, buf);
strncpy(buf, zeros, ntail1);
buf[ntail1] = '\0';
strcat(line1, buf);
strcpy(line2, " x ) ");
strncpy(buf, whites, strlen(strZ) - strlen(strY));
buf[strlen(strZ) - strlen(strY)] = '\0';
strcat(buf, strY);
strcat(line2, buf);
strncpy(buf, zeros, ntail2);
buf[ntail2] = '\0';
strcat(line2, buf);
strcpy(line3, " --");
strncpy(buf, bars, strlen(strZ));
buf[strlen(strZ)] = '\0';
strcat(line3, buf);
cout << line1 << endl;
cout << line2 << endl;
cout << line3 << endl;
if (strlen(strY) > 1) {
for (int i = 0; i < strlen(strY); i++) {
buf[0] = strY[strlen(strY) - i - 1];
buf[1] = '\0';
int y1 = atoi(buf);
if (y1 != 0) {
sprintf(strT, "%ld", nx * y1);
strcpy(line2, loffset);
strncpy(buf, whites, strlen(strZ) - strlen(strT) - i);
buf[strlen(strZ) - strlen(strT) - i] = '\0';
strcat(buf, strT);
strcat(line2, buf);
cout << line2 << endl;
}
}
cout << line3 << endl;
}
cout << line4 << endl;
}
