#include <stdio.h> main()
{
int year, flag;
printf("Enter year:"); scanf("%d",&year ); if ((year % 4 == 0 && year % 100 != 0) || (year % 400 == 0)) { flag = 1; /*如果year是闰年,则标志变量flag置1*/ } else { } flag = 0; /*否则,标志变量flag置0*/ if (flag) {
printf("%d is a leap year!\n",year); /*打印“是闰年”*/
}
}
else { printf("%d is not a leap year!\n",year); /* 打印“不是闰年”*/ }
#include <stdio.h> main()
{
char ch; ch = getchar(); if ((ch >= 'a' && ch <= 'z') || (ch >= 'A' && ch <= 'Z')) { printf("It is an English character!\n"); } else if (ch <= '9' && ch >= '0') { printf("It is a digit character!\n"); } else if (ch == ' ') {
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