#include <stdio.h> int main() { int days; printf("输入一个整数: \n"); scanf("%d",&days); // 补足×××处的表达式,使得满足程序功能描述 if(1<=days&&days<=5) printf("workdays, fighting\n"); else if(6<=days&&days<=7) printf("weekend, relax~\n"); else printf("Ooops, not in 1~7\n"); return 0; }
#include <stdio.h> int main() { char ch; printf("输入一个字符:\n"); scanf("%c",&ch); if(97<=ch&&ch<=122) ch=ch-32; printf("%c\n",ch); return 0; }