C语言训练-数字母-题解(C语言代码)【简化】

#include<stdio.h>
#include<string.h>
int count(char arr[])
{
	int i = 0;
	int len = strlen(arr);
	int t = 0;
	for (i = 0; i < len; i++)
	{
		if ((arr[i] >= 'a' && arr[i] <= 'z') || (arr[i] >= 'A' && arr[i] <= 'Z'))
			t++;
	}
	return t;
}
int main()
{
	char arr[1000] = { 0 };
	scanf("%s", arr);
	int ret = count(arr);
	printf("%d\n", ret);

	return 0;
}