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Question

#include <iostream>
#include <string.h>
#include <algorithm>

using namespace std;

int main()
{
string a,ans;
cin>>a;
ans+='\0';

for (int i=a.length();i>=0;i--)
{
if (a[i] == '=')
break;
else if (a[i] == '/' && a[i-1] == 'e')
break;
ans+=a[i];
}

reverse(ans.begin(),ans.end());

cout<<ans;

return 0;
}

This is my code, I am getting the output correctly but my test cases are failing. Can someone help ?

Answer 1

you don't need null character just make
ans = "" //before loop.

make loop condition look like :
for (int i=a.length()-1;i>0;i--)
//added -1 and removed =