题解 | #图片整理#
字符个数统计
http://www.nowcoder.com/practice/eb94f6a5b2ba49c6ac72d40b5ce95f50
#include<stdio.h>
int main()
{
char arr[501] = {'\0'};//存放字符串
int count[128] = {0};//把字符串对应的ascii码作为下标
int sum = 0;//计算不同字符个数
scanf("%s",arr);
for (int i = 0; i < strlen(arr); ++i)
{
count[arr[i]]++;
}
//只要不为0 sum就加
for(int i = 0; i < 128; ++i)
{
if(count[i])
sum++;
}
printf("%d",sum);
}
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