Difference between revisions of "Ternary operator"
(Created page with "The '''ternary operator''' <code>?:</code> in C++ is the only operator that takes three operands and works similar to an if statement. It must be used carefully, and can lead...") |
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| − | The '''ternary operator''' <code>?:</code> in C++ is the only operator that takes three operands and works similar to an if statement. It must be used carefully, and can lead to obfuscated code. | + | The '''ternary operator''' <code>?:</code> in C++ is the only operator that takes three operands and works similar to an <code>if</code> statement. It must be used carefully, and can lead to obfuscated code. |
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| + | <code> a ? b : c </code> is equivalent to <code>if (a) b else c</code>. | ||
<source lang="cpp"> | <source lang="cpp"> | ||
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// using if statement | // using if statement | ||
| − | cout << "You have " << kids << "child"; | + | cout << "You have " << kids << " child"; |
if (kids != 1) | if (kids != 1) | ||
cout << "ren"; | cout << "ren"; | ||
| Line 13: | Line 15: | ||
// using ternary operator | // using ternary operator | ||
| − | cout << "You have " << kids << "child" << (kids != 1) ? "ren" : "" << endl; | + | cout << "You have " << kids << " child" << ((kids != 1) ? "ren" : "") << endl; |
</source> | </source> | ||
| + | |||
| + | The above code uses the ternary operator to accurately output 0 children, 1 child, 2 children, 3 children, etc. | ||
Latest revision as of 18:39, 23 January 2018
The ternary operator ?: in C++ is the only operator that takes three operands and works similar to an if statement. It must be used carefully, and can lead to obfuscated code.
a ? b : c is equivalent to if (a) b else c.
int kids;
cin >> kids;
// using if statement
cout << "You have " << kids << " child";
if (kids != 1)
cout << "ren";
cout << endl;
// using ternary operator
cout << "You have " << kids << " child" << ((kids != 1) ? "ren" : "") << endl;
The above code uses the ternary operator to accurately output 0 children, 1 child, 2 children, 3 children, etc.
