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perf(exercises/ex3.cpp): improve performance using map #310

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perf(exercises/ex3.cpp): improve performance using map
Oct 23, 2023
e9cad56
refactor(exercises/ex3.cpp): replaced 0 with EXIT_SUCCESS
Oct 23, 2023
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40 changes: 14 additions & 26 deletions exercises/ex3.cpp
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Original file line number Diff line number Diff line change
@@ -1,43 +1,31 @@
/* Could you still use a switch case here? May you can use a map. */

#include <iostream>
#include <map>
using namespace std;

int main()
{
string textInput;
map<string,string> presidents;

presidents.insert(make_pair("BarackObama","44th president of the United States"));
presidents.insert(make_pair("SandroPertini","Former President of the Italian Republic"));
presidents.insert(make_pair("NelsonMandela","Former President of South Africa"));
presidents.insert(make_pair("MahatmaGandhi","Bapu"));
presidents.insert(make_pair("DonaldKnuth","Creator of LaTeX"));
presidents.insert(make_pair("DennisRitchie","Creator of C"));

cout << "Enter a famous name+surname, ex. BarackObama " << endl;
cin >> textInput;

if (textInput == "BarackObama")
{
cout << "44th president of the United States" << endl;
}
else if (textInput == "SandroPertini")
{
cout << "Former President of the Italian Republic" << endl;
}
else if (textInput == "NelsonMandela")
{
cout << "Former President of South Africa" << endl;
}
else if (textInput == "MahatmaGandhi")
{
cout << "Bapu" << endl;
}
else if (textInput == "DonaldKnuth")
{
cout << "Creator of LaTeX" << endl;
}
else if (textInput == "DennisRitchie")
{
cout << "Creator of C" << endl;
}
else
auto it = presidents.find(textInput);
if(it == presidents.end())
{
cout << "Invalid input! Please enter a good name!" << endl;
return EXIT_FAILURE;
}
cout << presidents[textInput] << endl;

return 0;
return EXIT_SUCCESS;
}