求帮助🙏，怎么输出任意几个字母的ACSll码的和😂

怎么输出任意几个字母的ACSll码的和😂🙏🙏

#include <stdio.h>
int main()
{
    char ch;
    int sum = 0;
    while((ch = getchar()) != '\n')
    {
        sum += ch;
    }
    printf("%d",sum);
    return 0;
}