The return string.

The return string.

Question: judge whether a string is a return string. The so-called return string means that the I character of the string is equal to the n + 1-i character of the string, and the I is less than or equal to n/2. For example, "abcba" and "abba" are all input strings.

Solution:

The Nth + 1-i character of the string is equal to the nth + 1-i character of the string. If I is less than or equal to n/2, false is returned, if the execution of the loop is complete, true is returned.


Algorithm Implementation:

Bool isPalindromeStr (char str []) {if (str = NULL | str = NULL) {printf ("the string is NULL or empty, not a return string "); return false;} int n = 0; // String Length while (str [n]! = '\ 0') {n ++;} for (int I = 0; I <n/2; I ++) {if (str [I]! = Str [n-i-1]) return false;} return true ;}