A.str[i]+='a'-'A'
- int main()
- {
- string str="gEsP is Interesting";
- int x = str.length();
- GESP IS INTERESTING 。
- or(int i = 0; i < x; i++)
- if ((str[i]>='a') && (str[i]<='z'))
- ________________________;
- cout << str << endl;
- cout << endl;
- return 0;
- }
B.str[i]+=20
C. str[i]+='A'-'a'
D. ⽆法实现