Stacks,String,For.....

Hey, i'm little confused. Somewhere in this code there is a problem i think so. I believe that the problem is in the for which push p in the stack.I need help!

 #include<iostream>
#include<algorithm>
#include<stack>
#include<vector>
#include<string>
using namespace std;

int main(){

int a,b,n,i,j;
stack <string> c;
vector <string> d;
string p;

cin>>a;
for(i=0;i<a;i++){
    cin>>n>>b;

for(j=0;j<n;j++){
    c.pop();
}
for(j=0;j<=b;j++){
    cin>>p;
    c.push(p);
}
}
while(!c.empty()){
    d.push_back(c.top());
    c.pop();
}
sort(d.begin(),d.end());
for(i=0;i<d.size();i++)
    cout<<d[i]<<endl;
}

Last edited on

MiiNiPaa (8886)

1
2
3

for(j=0;j<n;j++){
    c.pop();
}

At the moment c is empty. Trying to pop an empty stack leads to undefined behavior.

HelenI (51)

Still wrong :/

MiiNiPaa (8886)

What exactly is wrong?
It works for me.

Last edited on

HelenI (51)

the problem is to find out which cars are still in the ferry boat. It's given a number of the ports, how many cars went out, how many cars came in and the name of the car.
For example:
Input:
3
0 4 Audi Ford Fiat Toyota
2 3 BMW Suzuki Honda
4 2 Mercedes Citroen

Output:
Audi
Citroen
Mercedes
i'm sorry for my poor english

Last edited on

MiiNiPaa (8886)

In this case your code works if you replace <= with canonical < in one of the loops (Why did you have it in first place? All other loops uses <)

HelenI (51)

Now it works!!! Thank you very much!!! :)

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Stacks,String,For.....