08/12/17 16:58:42
>>128
2.
include <stdio.h>
int main(void){
char c[100] = "";
char key;
int i, j = 0;
printf("文字列を入力:");
gets(c);
printf("文字key:");
key = getchar();
printf("文字%cの頻度=", key);
for(i = 0; i < 100; i++) if(c[i] == key) j++;
printf("%d\n", j);
return 0;
}