有点错误！！！

#include<stdio.h>

main()

{ long num;

int indiv,ten,hundred,thousand,ten_thousand;

int hundred_thousand ,million,ten_million,hundred_million,billion,sum;

printf("please input a positive integral:\n");

scanf("%ld",&num);

billion=num/1000000000;

hundred_million=(int)(num-billion*1000000000)/100000000;

ten_million=(int)(num-billion*1000000000-hundred_million*100000000)/10000000;

million=(int)(num-billion*1000000000-hundred_million*100000000-ten_million*10000000)/1000000;

hundred_thousand=(int)(num-billion*1000000000-hundred_million*100000000-ten_million*10000000-million*1000000)/100000;

ten_thousand=(int)(num-billion*1000000000-hundred_million*100000000-ten_million*10000000-million*1000000-hundred_thousand*100000)/10000;

thousand=(int)(num-billion*1000000000-hundred_million*100000000-ten_million*10000000-million*1000000-hundred_thousand*100000-ten_thousand*10000)/1000;

hundred=(int)(num-billion*1000000000-hundred_million*100000000-ten_million*10000000-million*1000000-hundred_thousand*100000-ten_thousand*10000-thousand*1000)/100;

ten=(int)(num-billion*1000000000-hundred_million*100000000-ten_million*10000000-million*1000000-hundred_thousand*100000-ten_thousand*10000-thousand*1000-hundred*100)/10;

indiv=(int)(num-billion*1000000000-hundred_million*100000000-ten_million*10000000-million*1000000-hundred_thousand*100000-ten_thousand*10000-thousand*1000-hundred*100-ten*10);

sum=(indiv+ten+hundred+thousand+ten_thousand+hundred_thousand+million+ten_million+hundred_million+billion);

printf("the sum is=%d",sum);

}

输入一个正整数，然后使其各位值相加。如输入：2345。就要输出：sum=2+3+4+5=14

[1575 byte] By [msdn] at [2007-11-19 9:53:15]