main.cpp:
#include <stdio.h>
#include "VeryLongInt.h"
int InitializeFromFile(char* fileName, VeryLongInt* &x, VeryLongInt* &y);
//void ShowScreen();
int main(int argc, char* argv[]){
char* inputFile;
char* outputFile;
if (argc < 2){
printf("Usage: LongIntDataType.exe [InputFile] [OutputFile]\n");
printf("Using default configuration: LongIntDataType.exe input.txt output.txt\n\n");
inputFile = "input.txt";
outputFile = "output.txt"; // "output/output.txt"
} else {
inputFile = argv[1];
if (argc == 2)
outputFile = "output.txt";
else
outputFile = argv[2];
}
VeryLongInt *x, *y, *z;
int succ = InitializeFromFile(inputFile, x, y);
if (!succ) return 0;
z = VeryLongInt::Add(x, y);
z->SaveToFile(outputFile, 0);
delete z;
z = VeryLongInt::Subtract(x, y);
z->SaveToFile(outputFile, 1);
delete z;
z = VeryLongInt::Multiply(x, y);
z->SaveToFile(outputFile, 1);
delete z;
z = VeryLongInt::Div(x, y);
if (z != NULL){
z->SaveToFile(outputFile, 1);
delete z;
} // else FW: write NULL to file for checking students' result
z = VeryLongInt::Mod(x, y);
if (z != NULL) {
z->SaveToFile(outputFile, 1);
delete z;
} // else FW: write NULL to file for checking students' result
// Calculate x^10
z = VeryLongInt::Power(x, 10);
z->SaveToFile(outputFile, 1);
delete z;
delete x;
delete y;
// ShowScreen();
return 1;
}
// Note: I have not optimized this function yet. Anyways, it works
// It's easier to use fgets function but it's not efficient for memory.
int InitializeFromFile(char* fileName, VeryLongInt* &x, VeryLongInt* &y){
FILE *fptr;
char* buffer;
char c;
fopen_s(&fptr, fileName, "r");
if (fptr == NULL){
printf("Can't open file [%s]", fileName);
return 0;
}
// Read the first number
int count = 0;
int ok = 1;
while (!feof(fptr) && ok){
c = fgetc(fptr);
if (c != '\n')
count++;
else ok = 0;
}
fseek(fptr,0, 0);
buffer = new char[count+1];// +1 for NULL character
buffer[count] = '\0';
count = 0;
ok = 1;
while (!feof(fptr) && ok){
c = fgetc(fptr);
if (c != '\n'){
buffer[count] = c;
count++;
} else ok = 0;
}
x = VeryLongInt::Parse(buffer);
delete buffer;
// Read the second number
int secondCount = 0;
ok = 1;
while (!feof(fptr) && ok){
c = fgetc(fptr);
if (c != '\n'){
secondCount++;
} else ok = 0;
}
buffer = new char[secondCount+1];// +1 for NULL character
buffer[secondCount] = '\0';
fseek(fptr, count+2, 0);
secondCount = 0;
ok = 1;
while (!feof(fptr) && ok){
c = fgetc(fptr);
if (c != '\n'){
buffer[secondCount] = c;
secondCount++;
} else ok = 0;
}
y = VeryLongInt::Parse(buffer);
delete buffer;
fclose(fptr);
return 1;
}
void ShowScreen(){
VeryLongInt *x = new VeryLongInt(998);
VeryLongInt *y = new VeryLongInt(9);
VeryLongInt *z;
printf("Simulation of operators between 2 very long integers\n");
printf("Sum:\t\t");
z = VeryLongInt::Add(x, y);
x->Print(); printf(" + "); y->Print();
printf(" = "); z->Print(); printf("\n");
delete z;
printf("Subtract:\t");
z = VeryLongInt::Subtract(x, y);
x->Print(); printf(" - "); y->Print();
printf(" = "); z->Print(); printf("\n");
delete z;
printf("Multiply:\t");
x->Print(); printf(" * "); y->Print();
z = VeryLongInt::Multiply(x, y);
printf(" = "); z->Print(); printf("\n");
delete z;
printf("DIV:\t\t");
x->Print(); printf(" / "); y->Print();
z = VeryLongInt::Div(x, y);
printf(" = "); z->Print(); printf("\n");
delete z;
printf("MOD:\t\t");
z = VeryLongInt::Mod(x, y);
x->Print(); printf(" %% "); y->Print();
printf(" = "); z->Print(); printf("\n");
delete z;
delete x;
delete y;
x = VeryLongInt::Parse("-23234");
y = VeryLongInt::Parse("256");
if (VeryLongInt::Compare(x, y) == -1){
printf("First number is less than second number.\n");
} else
printf("First number isnot less than second number.\n");
z = VeryLongInt::Add(x, y);
printf("Sum:\t\t");
x->Print(); printf(" + "); y->Print(); printf(" = "); z->Print();
printf("\n");
delete z;
printf("Subtract:\t");
z = VeryLongInt::Subtract(x, y);
x->Print(); printf(" - "); y->Print(); printf(" = "); z->Print();
printf("\n");
delete z;
x->Print(); printf("^10 = ");
z = VeryLongInt::Power(x, 10);
char *temp = z->ToString();
printf("%s\n", temp);
delete temp;
delete z;
delete x;
delete y;
}
and the VeryLongInt.h
class VeryLongInt{
public:
VeryLongInt();
VeryLongInt(int val); // convert an integer into VeryLongInt object
~VeryLongInt();
VeryLongInt* Clone(); // return another copy of current object (replicate the current object)
int GetSign(); // return sign of current number
void ToggleSign(); // toggle sign of current number
char* ToString(); // convert current object into string
void Print(); // output current number to console by using printf() function
int SaveToFile(char* fileName, int appendFlag);// output to file. appendFlag: +1: append, 0: overwrite
static VeryLongInt* Add(VeryLongInt *x, VeryLongInt *y); // x + y
static VeryLongInt* Subtract(VeryLongInt *x, VeryLongInt *y); // x - y
static VeryLongInt* Multiply(VeryLongInt *x, VeryLongInt *y); // x * y
static VeryLongInt* Div(VeryLongInt *x, VeryLongInt *y); // x div y
static VeryLongInt* Mod(VeryLongInt *x, VeryLongInt *y); // x % y
static VeryLongInt* Power(VeryLongInt *x, int n); // x^n
static int EqualTo(VeryLongInt *x, VeryLongInt *y); // x == y?
static int Compare(VeryLongInt *x, VeryLongInt *y); // return +1 if x > y; 0 if x = y; -1 if x < y
static VeryLongInt* Parse(char *str); // convert a string into a very long integer
// Add your neccessary methods here ...
};
Many things i dont know up to now, but i seem so usual.
