题解 | #字符个数统计#
字符个数统计
http://www.nowcoder.com/practice/eb94f6a5b2ba49c6ac72d40b5ce95f50
int main()
{
char c=0;
int count[128]={0};
int num=0;
while((c=getchar())!='\n'){
if(count[(int)(c)]==0){
count[(int)(c)]=1;
num++;
}
}
printf("%d",num);
return 0;
}
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