Question

Help with C++ reverse program with leading zeros. I need to put the line from the function that display the zeros in main not in the function. So how can I move the display with leading zeros in main. Thanks. Here is my code.

#include <iostream>

#include <cstdlib>

#include <iostream>

using std::cout;

using std::cin;

using std::endl;

//function templates

int reverseNum(int);

int main()

{

//variables

char buf[100];

int num;

while (true)

{

//prompt user for input

cout << "Enter the number to performreverse (q or Q to quit): ";

cin >> buf;

num = atoi(buf);

//quit program if user entered a q

if (buf[0] == 'q' || buf[0] == 'Q') break;

cout << "Entered number: " << num << endl;

cout << "Reversed number: " << reverseNum(num) << endl;

}

}

int reverseNum(int number)

{

int reversedNum = 0;

int reminder;

int zeros = 0;

bool firsttime = true;

while (number > 0)

{

reminder = number % 10;

//If reminder is 0 and the first non zero number is not yet encountered

if (reminder == 0 && firsttime) {

zeros++;

}

//If first non zero digit is encounrered, zeros encountered later should'nt be counted

else {

firsttime = false;

}

reversedNum = reversedNum * 10 + reminder;

number /= 10;

}

cout << "Reversed number With leading zeros : ";

for (int i = 0; i<zeros; i++) {

cout << 0;

}

cout << reversedNum << endl;

return reversedNum;

}

Answer 1

#include <iostream>

#include <cstdlib>

#include <iostream>

using std::cout;

using std::cin;

using std::endl;

//function templates

int reverseNum(int);

int main()

{

//variables

char buf[100];

int num, num1, len = 0, temp, len1 = 0, ret;

while (true)

{

//prompt user for input

cout << "Enter the number to performreverse (q or Q to quit): ";

cin >> buf;

num = num1 = atoi(buf);

while(num1 > 0) //find the length of the number

{

num1 = num1 / 10;

len++;

}

//quit program if user entered a q

if (buf[0] == 'q' || buf[0] == 'Q') break;

cout << "Entered number: " << num << endl;

ret = reverseNum(num); //ret gets the return type from reverseNum function

temp = ret;

while(temp > 0) //find the length of the reversed number

{

temp = temp / 10;

len1++;

}

cout << "Reversed number With leading zeros : ";

for(int i=0; i<(len - len1); i++)

cout << 0;

cout << ret << endl;

cout << "Reversed number: " << ret << endl;

}

}

int reverseNum(int number)

{

int reversedNum = 0;

int reminder;

int zeros = 0;

bool firsttime = true;

while (number > 0)

{

reminder = number % 10;

//If reminder is 0 and the first non zero number is not yet encountered

if (reminder == 0 && firsttime) {

zeros++;

}

//If first non zero digit is encounrered, zeros encountered later should'nt be counted

else {

firsttime = false;

}

reversedNum = reversedNum * 10 + reminder;

number /= 10;

}

/*cout << "Reversed number With leading zeros : ";

for (int i = 0; i<zeros; i++) {

cout << 0;

}

cout << reversedNum << endl;*/

return reversedNum;

}

Terminal -) (82%) w) 3:56 AM Save *Untitled Document 1 zeros.cpp while (true) //prompt user for input cout <Enter the number to performreverse (q or Q to quit):" cin >buf; num numatot (buf); sasi@sasi-Aspire-E5-575G: ~/Desktop/pro/C++ while(numi0) //find the len sasisasi-Aspire-E5-575G:~/Desktop/pro/C++$ g++ zeros.cpp -o zeros sasi@sasi-Aspire-E5-575G:-/Desktop/pro/C++$ ./zeros Enter the number to perform, reverse (q or Q to quit): 1θ2000 Entered number: 102900 Reversed number With leading zeros : 000201 Reversed number: 201 Enter the number to performreverse (q or Q to quit): q sasi@sasi-Aspire-E5-575G : ~/Desktop/pro/C++$ Len+t; //quit program if user entered a q cout << "Entered number: "<< num << endl; ret reverseNum(num); temp = ret; //ret gets the while(temp 0) //find the len temp = temp / 10; Len1++ cout << "Reversed number With leading zeros: " cout << ret << endl; cout << "Reversed number: "<< ret << endl; C++▼ Tab Width: 8▼ Ln35, Col 100 INS ▼