Input: 3 Elephant
Output: Ele
but the input string is not read.. any help?
Thanks in advance
#include <iostream>
#include <string>
using namespace std;
int main ()
{
int n;
string input;
while ( scanf ("%d %s",&n, input ) != EOF )
{
string sub = input.substr(0,n);
cout<< sub;
}
getchar();
return 0;
}
scanf - is a C function. It knows nothing about C++ class std::string. Its format specifier %s is used to enter data in a character array.
You mixed two languages: C and C++. It is a bad style of programming. Instead of the loop
while ( scanf ("%d %s",&n, input ) != EOF )
{
string sub = input.substr(0,n);
cout<< sub;
}
use the following loop
while ( std::cin >> n >> input )
{
string sub = input.substr(0,n);
cout<< sub;
}
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