#include<stdio.h> int main() { char ch; int letters=0,space=0,number=0,other=0; printf(“请输入一行字符:\n”); while((ch=getchar())!=’\n’) { if((ch>=‘a’&&ch<=‘z’)||(ch>=‘A’&&ch<=‘Z’)) letters++; else if(ch==’ ') space++; else if(ch>=‘0’&&ch<=‘9’) number++; else other++; } printf(“一行字符中共有\n字母%d个\n空格%d个\n数字%d个\n其他字符%d个\n”,letters,space,number,other);
return 0; }