题解 | #判断字母#
判断字母
https://www.nowcoder.com/practice/44d2d63103664913bc243d3836b4f341
#include <stdio.h> int main() { int ch=0; while((ch = getchar()) != EOF) { if(ch >= 'a' && ch <= 'z' || ch >='A' && ch <= 'Z') { printf("YES\n"); } else { printf("NO\n"); } getchar(); } return 0; }