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General Tech Bugs & Fixes 2 years ago
Posted on 16 Aug 2022, this text provides information on Bugs & Fixes related to General Tech. Please note that while accuracy is prioritized, the data presented might not be entirely correct or up-to-date. This information is offered for general knowledge and informational purposes only, and should not be considered as a substitute for professional advice.
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I am reading counting sort algorithm on Geeksforgeeks. I have understood the algorithm but I am having a problem in the following for loop syntax. I have tried exactly the same syntax in cpp shell but it is not working.for(int i=0; arr[i]; i++) { ++count[arr[i]]; }Here, arr[] is a char array and count[] is an integer array.Please help me to understand this kind of for loop.
arr[i] evaluates to a character. If it is a null character then loop will terminate. You can think of it as
arr[i]
for(com/tag/int">int i=0; arr[i] != '\0'; i++) {}
In C++ any value other than 0 evaluates to true. '\0' is encoded as 0 and therefore arr[i] will evaluate to false when its value becomes '\0'.
0
true
'\0'
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