C++ 代码

#include<iostream>
#include<cstring>

using namespace std;
    char a[1010];
int main(){

    int n = 0 ;
    cin >> a;
    n = sizeof(a);

    for( int i=0 ; i<n  ; i++ ){

        if(  a[i] >= '1' && a[i] <= '9'){
            int x = a[i] - '0'-1;
            char  y=a[i-1];
            while( x > 0){
                cout << y;
                x = x - 1;
            }
        }
        else 
            cout << a[i];


    }
    return 0;
}