19 lines
382 B
C++
19 lines
382 B
C++
#include <iostream>
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#include <cassert>
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using namespace std;
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int f(int x) { return ++x;}
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int g(int& x) { return ++x;}
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int main() {
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int x = 2;
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/* f is "functional", as it has no side-effects */
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f(x);
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assert(x==2);
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/* g changes a variable of an outer scope,
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* i.e. it has a side effect
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* Thus, g is not functional!
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*/
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g(x);
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assert(x!=2);
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}
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