摘要： int main(){ string s = "高速公路大撞车"; string result; unsigned int i = 0; int j = 0; while(i 0) { if(j == 5 && i == s.size() - 1) { result.append(s.substr(i,1)); break; } else if(j == 5 && i < s.size() - 1) ... 阅读全文