#include<bits/stdc++.h> using namespace std; int main(){ char a[201]; char b,c; cin>>a; cin>>b>>c; //遍历数组a,将b字符换成c字符 int i; while(a[i]!='\0'){ if(a[i]==b){ a[i]=c; } i++; } cout<<a<<endl; return 0; }