C/C++の宿題片付けます 137代目

>>937
#include <stdio.h>
#define LEN 128

int main(void)
{
char buf[LEN], *p;
int t, c, a, g;

t = c = a = g = 0;
gets(buf);

p = buf;
while (*p) {
switch (*p) {
case 't': t++; break;
case 'c': c++; break;
case 'a': a++; break;
case 'g': g++; break;
}
p++;
}

printf("Thymine (t) : %d\nCytosine (c) : %d\nAdenine (a) : %d\nGuanine (g) : %d\n", t, c, a, g);

return 0;
}