PTA(Basic Level)-1002 写出这个数

#include <stdio.h>

#define MAX 10
#define MAX_LEN 100
char *pingYing[MAX] = { "ling", "yi", "er", 
    "san","si", "wu", "liu", "qi", "ba", "jiu"
};

unsigned int cntNumberSum( char *s );    
void printPY( unsigned int sum , unsigned int sta);

int main(int argc, char *argv[])
{
    unsigned int sum;
    unsigned int sta;
  //unsigned long n;
    char numStr[MAX_LEN];
    scanf("%s",numStr);
    
    sum = cntNumberSum( numStr);
    //sum = cntDigitSum( n );
    sta = sum;
    printPY( sum, sta );
    
    return 0;
}

unsigned int cntNumberSum( char *s )
{
    unsigned int sum = 0;
    while ( *s != ‘\0‘ ) {
        sum += *s - ‘0‘;
        s++;
    }
    return sum;
}

void printPY( unsigned int sum, unsigned int sta  )
{
    if ( sum != 0 ) {
        printPY( sum/10, sta );
        printf("%s", pingYing[ sum%10 ]);
        if ( sum != sta) {
            printf(" ");
        }
    }
}