HDU2027 统计元音

#include <stdio.h>
#include <string.h>

int
main(int argc, char **argv) {
int ncase, i, len;
char str[105];
int num_a, num_e, num_i, num_o, num_u;
int is_first = 1;;
scanf("%d", &ncase);
getchar();
while (ncase--) {
num_a = num_e = num_i = num_o = num_u = 0;
fgets(str, 105, stdin);
len = strlen(str);
str[len - 1] = 0;
len--;
for (i = 0; i < len; ++ i) {
switch (str[i]) {
case 'a':
num_a++;
break;
case 'e':
num_e++;
break;
case 'i':
num_i++;
break;
case 'o':
num_o++;
break;
case 'u':
num_u++;
break;
}
}
if (!is_first) printf("\n");
is_first = 0;
printf("a:%d\n", num_a);
printf("e:%d\n", num_e);
printf("i:%d\n", num_i);
printf("o:%d\n", num_o);
printf("u:%d\n", num_u);
}
return 0;
}