#include<stdio.h>

int main()

{

int  x;

int sum;

while(x>=1000&&x<10000);

{

sum=x/1000+x%1000/100+x%1000%100/10+x%1000%100%10;

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

}

if(x=1234)

printf(sum=%d",10);

return 0;

}

int getSum(int x){

int sum = 0;

int zz = x;

while(zz > 9){

int i = zz%10;

sum +=i;

zz = x/10;

}

sum += zz;

return sum;

}