阅读程序写结果：
#include <iostream>using namespace std;int main(){ int i, length1, length2; string s1, s2; s1 = "I have a dream."; s2 = "I Have A Dream."; length1 = s1.size(); length2 = s2.size(); for (i = 0; i < length1; i++) if (s1[i] >= 'a' && s1[i] <= 'z') s1[i] -= 'a' - 'A'; for (i = 0; i < length2; i++) if (s2[i] >= 'a' && s2[i] <= 'z') s2[i] -= 'a' - 'A'; if (s1 == s2) cout << "=" << endl; else if (s1 > s2) cout << ">" << endl; else cout << "<" << endl; return 0;}输出：_________