1576. 替换所有的问号

1576. 替换所有的问号

C代码：自己写的

char * modifyString(char * s){int n = strlen(s);for (int i = 0; i < n; ++i){if (s[i] == '?') {if (i != 0 && i != n-1) {for (int j = 0; j < 26; ++j) {if ('a' + j != s[i-1] && 'a' + j != s[i+1]) {s[i] = 'a' + j;break;}}} else if (i == 0){for (int j = 0; j < 26; ++j) {if ('a' + j != s[i+1]) {s[i] = 'a' + j;break;}}} else {for (int j = 0; j < 26; ++j) {if ('a' + j != s[i-1]) {s[i] = 'a' + j;break;}}}}}return s;
}

C代码：官方

char * modifyString(char * s) {int n = strlen(s);for (int i = 0; i < n; ++i) {if (s[i] == '?') {for (char ch = 'a'; ch <= 'c'; ++ch) {if ((i > 0 && s[i - 1] == ch) || (i < n - 1 && s[i + 1] == ch)) {continue;}s[i] = ch;break;}}}return s;
}