题解 | #表示数字#

#include<stdio.h>
#include<string.h>
int main()
{
    char str[150];
    char arr[150] = {'\0'};
    scanf("%s", str);
    int len = strlen(str);
    int i=0, j=0;
    while(i < len)
    {
        if( isdigit(str[i]) )
        {
            arr[j++] = '*';
            arr[j++] = str[i];
            i++;
            while( isdigit(str[i]) )
            {
                arr[j++] = str[i];
                i++;
            }
            arr[j++] = '*';
        }
        else
        {
            arr[j++] = str[i];
            i++;
        }
    }
    printf("%s", arr);
    return 0;
}