I keep getting an error on visual studio that says list iterator not decrementable: line 256
My program works fine on Linux, but visual studio compiler throws this error. Dammit this is why I hate windows. Why can't the world run on Linux?
Anyway, do you see what my problem is?
#include <iostream>
#include <fstream>
#include <sstream>
#include <list>
using namespace std;
int main(){
/** create the list **/
list<int> l;
/** create input stream to read file **/
ifstream inputstream("numbers.txt");
/** read the numbers and add them to list **/
if( inputstream.is_open() ){
string line;
istringstream instream;
while( getline(inputstream, line) ){
instream.clear();
instream.str(line);
/** get he five int's **/
int one, two, three, four, five;
instream >> one >> two >> three >> four >> five;
/** add them to the list **/
l.push_back(one);
l.push_back(two);
l.push_back(three);
l.push_back(four);
l.push_back(five);
}//end while loop
}//end if
/** close the stream **/
inputstream.close();
/** display the list **/
cout << "List Read:" << endl;
list<int>::iterator i;
for( i=l.begin(); i != l.end(); ++i){
cout << *i << " ";
}
cout << endl << endl;
/** now sort the list **/
l.sort();
/** display the list **/
cout << "Sorted List (head to tail):" << endl;
for( i=l.begin(); i != l.end(); ++i){
cout << *i << " ";
}
cout << endl;
list<int> lReversed;
for(i=l.begin(); i != l.end(); ++i){
lReversed.push_front(*i);
}
cout << "Sorted List (tail to head):" << endl;
for(i=lReversed.begin(); i!=lReversed.end(); ++i){
cout << *i << " ";
}
cout << endl << endl;
/** remove first biggest element and display **/
l.pop_back();
cout << "List after removing first biggest element:" << endl;
cout << "Sorted List (head to tail):" << endl;
for( i=l.begin(); i != l.end(); ++i){
cout << *i << " ";
}
cout << endl;
cout << "Sorted List (tail to head):" << endl;
lReversed.pop_front();
for(i=lReversed.begin(); i!=lReversed.end(); ++i){
cout << *i << " ";
}
cout << endl << endl;
/** remove second biggest element and display **/
l.pop_back();
cout << "List after removing second biggest element:" << endl;
cout << "Sorted List (head to tail):" << endl;
for( i=l.begin(); i != l.end(); ++i){
cout << *i << " ";
}
cout << endl;
lReversed.pop_front();
cout << "Sorted List (tail to head):" << endl;
for(i=lReversed.begin(); i!=lReversed.end(); ++i){
cout << *i << " ";
}
cout << endl << endl;
/** remove third biggest element and display **/
l.pop_back();
cout << "List after removing third biggest element:" << endl;
cout << "Sorted List (head to tail):" << endl;
for( i=l.begin(); i != l.end(); ++i){
cout << *i << " ";
}
cout << endl;
cout << "Sorted List (tail to head):" << endl;
lReversed.pop_front();
for(i=lReversed.begin(); i!=lReversed.end(); ++i){
cout << *i << " ";
}
cout << endl << endl;
/** create frequency table **/
const int biggest = 1000;
//create array size of biggest element
int arr[biggest];
//set everything to zero
for(int j=0; j<biggest+1; j++){
arr[j] = 0;
}
//now update number of occurences
for( i=l.begin(); i != l.end(); i++){
arr[*i]++;
}
//now print the frequency table. only print where occurences greater than zero
cout << "Final list frequency table: " << endl;
for(int j=0; j<biggest+1; j++){
if( arr[j] > 0 ){
cout << j << ": " << arr[j] << " occurences" << endl;
}
}
return 0;
}//end main
