题解 | #字符个数统计#
字符个数统计
https://www.nowcoder.com/practice/eb94f6a5b2ba49c6ac72d40b5ce95f50
#include <stdio.h>
int main() {
int a, b;
char ch;
int cnt1 = 0;
int cnt[128] = {0};
ch = getchar();
while (ch != '\n') {
cnt[ch] = 1;
ch = getchar();
}
for (int i = 0; i < 128; i++)
if (cnt[i])cnt1++;
printf("%d", cnt1);
}
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