87 lines
1.5 KiB
C
87 lines
1.5 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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/**
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* score [90-100] A
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* score [80-90) B
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* score [70-80) C
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* score [60-70) D
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* score [0-60) E
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*/
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// 闰年的判断：能被4整除但不能被100整除，或者能被400整除
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int main( )
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{
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int year;
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scanf("%d", &year);
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if (year % 4 == 0 && year % 100 != 0 || year % 400 == 0)
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printf("%d is leap year.\n", year);
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else
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printf("%d is not leap year.\n", year);
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#if 0
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int score;
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printf("Enter a score:[0,100]:\n");
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scanf("%d", &score);
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if (score < 0 || score > 100)
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{
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fprintf(stderr, "Input error!\n");
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exit(1);
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}
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if (score > 90)
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puts("A");
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else if (score > 80)
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puts("B");
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else if (score > 70)
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puts("C");
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else if (score > 60)
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puts("D");
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else
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puts("E");
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#endif
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#if 0
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if (score <= 100 && score >= 90)
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puts("A");
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if (score <= 90 && score >= 80)
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puts("B");
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if (score <= 80 && score >= 70)
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puts("C");
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if (score <= 70 && score >= 60)
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puts("D");
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if (score <= 60 && score >= 0)
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puts("E");
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#endif
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#if 0
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int a = 1, b = 1,c=2;
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if (a == b)
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if(b==c)
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printf("a==b\n");
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else
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printf("a!=b\n")
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注意：else看的是最近的if！！！
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#endif
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#if 0
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int a = 9, b = 10;
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if (b++ < a)
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printf("1\n");
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else
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printf("0\n");
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printf("a=%d,b=%d\n", a, b);
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printf("%d\n", (++b < a, ++a, b++));
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#endif
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exit(0);
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} |