# include & ltstring.h & gt
void main()
{
int i,len,sum = 0;
char str[10];
Printf("輸入正整數:");
scanf("%s ",str);
len = strlen(str);
for(I = 0;我& ltleni++)
sum+= str[I]-' 0 ';
Printf("%s為%d位數,所有位數之和為%d\n ",str,len,sum);