第一个题:
#include <iostream> using namespace std; const int N = 30; int main() { char outputStr[N]; unsigned int inputStr; int i = 0; cin>>inputStr; while (inputStr){ outputStr[i++] = inputStr % 10 + 'a'; inputStr = inputStr / 10; } outputStr[i] = '\0'; for (--i; i >= 0; i--){ cout<<outputStr[i]; } cout<<endl; return 0; }