for(i=0;i<length;i++){ a[arr[i]-97]+=1; }
时间: 2024-05-27 10:12:18 浏览: 18
This code snippet is incomplete as the third part of the for loop, which specifies the increment of the loop variable "i", is missing. However, assuming that the third part is i++, the code is as follows:
The code initializes an integer array "a" with all elements set to 0. It then loops through an array "arr" of characters, where "length" is the length of the array.
For each character in "arr", it subtracts 97 from its ASCII value (assuming that the character is a lowercase letter) and uses the result as the index of the corresponding element in the "a" array. It then sets the value of that element to 1.
In other words, the code is creating a binary map of the lowercase letters that appear in the "arr" array. If a letter appears in "arr", the corresponding element in "a" will be set to 1; otherwise, it will remain 0.