版本一：switch，case多重标签的代码
#include
int main(void) {
int a_ct, e_ct, i_ct, o_ct, u_ct ;
a_ct = e_ct = i_ct = o_ct = u_ct = 0;
char ch;
printf("Enter some text,enter # to quit.n");
while ((ch = getchar()) != '#') {
switch (ch) {
case 'a':
case 'A':
a_ct++;
break;
case 'e':
case 'E':
e_ct++;
break;
case 'i':
case 'I':
i_ct++;
break;
case 'o':
case 'O':
o_ct++;
break;
case 'u':
case'U':
u_ct++;
break;
default:
break;
}
}
printf("Number of vowles:A E I O Un");
printf(" %4d%4d%4d%4d%4dn", a_ct, e_ct, i_ct, o_ct, u_ct);
return 0;
}
版本二：无多重标签，要用到toupper()函数
#include
//toupper()函数的库函数
#include
int main(void) {
int a_ct, e_ct, i_ct, o_ct, u_ct ;
a_ct = e_ct = i_ct = o_ct = u_ct = 0;
char ch;
printf("Enter some text,enter # to quit.n");
while ((ch = getchar()) != '#') {
ch = toupper(ch);
switch (ch) {
case 'A':
a_ct++;
break;
case 'E':
e_ct++;
break;
case 'I':
i_ct++;
break;
case 'O':
o_ct++;
break;
case'U':
u_ct++;
break;
default:
break;
}
}
printf("Number of vowles:A E I O Un");
printf(" %4d%4d%4d%4d%4dn", a_ct, e_ct, i_ct, o_ct, u_ct);
return 0;
}
