반올림하기

/*
        Ban Ol lim program
        coded by jo kyung min
        1999/04/08
*/
#include <stdio.h>


// 10 jari Ban Ollim -> LongBanOllim( &longv, 10 )
// 100 LongBanOllim( &longv , 100 )
// r u ready??
void LongBanOllim( long* value , int jari )
{
        int one = *value%jari;
        if( one >=5 )
                *value+= (10-one);
        else
                *value-= one;
}


void main()
{
        long a = 123;
        LongBanOllim( &a , 10);

        printf("\n%ld",a);
}