pat乙级1016 部分A+B

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>

int main()
{
    int counta = 0, countb = 0;
    int pa=0,pb=0;
    char a[10], b[10];
    int da, db;
    scanf("%s %d %s %d", a, &da, b, &db);
    int i = 0;
    while (a[i] != '\0')
    {
        if (a[i] ==da+48 )
        {
            counta++;
        }
        i++;
    }
    i=0;
    while (b[i] != '\0')
    {
        if (b[i] == db+48)
        {
            countb++;
        }
        i++;
    }
    if (counta != 0)
    {

        while (counta > 0)
        {   
            counta--;
            pa = pa +da * pow(10,counta);
            
        }
    }
    if (countb != 0)
    {
        while (countb >0)
        {
            countb--;
            pb = pb +db  * pow(10,countb);
        }
    }

    printf("%d", pa + pb);
    return 0;
}