执行以下程序后，输出结果为。#include#define N 20int main(){char str[N]="aB1cD2Ef3gHI4J5K";int i=0,s=0;while(str[i]!='\0'){if(str[i]>='0'&&str[i]<='9'){s++;}i++;}printf("%d\n",s);return 0;}