B天天玩手机（字符串 循环）

#include<stdio.h>
int main()
{
	char a[101];
	int i;
	int num=0; 
	for(;;)
	{
		scanf("%c",&a[i]);
		if(a[i]=='\n')
		    break; 
		if(a[i]=='A'||a[i]=='B'||a[i]=='C')
		    num++;
		if(a[i]=='D'||a[i]=='E'||a[i]=='F')
		    num+=2;
		if(a[i]=='G'||a[i]=='H'||a[i]=='I')
		    num+=3;
		if(a[i]=='J'||a[i]=='K'||a[i]=='L')
		    num+=4;
		if(a[i]=='M'||a[i]=='N'||a[i]=='O')
		    num+=5;
		if(a[i]=='P'||a[i]=='Q'||a[i]=='R'||a[i]=='S')
		    num+=6;
		if(a[i]=='T'||a[i]=='U'||a[i]=='V')
		    num+=7;
		if(a[i]=='W'||a[i]=='X'||a[i]=='Y'||a[i]=='Z')
		    num+=8;
		if(a[i]=='*')
		    num+=9;
	}
	printf("%d",num);
 }