35 lines
689 B
C
35 lines
689 B
C
/*-------------------------------------------------------
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任意输入一个日期，计算这一天是这一年中的第几天（考虑闰年和平年）。
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-------------------------------------------------------*/
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#include <stdio.h>
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main()
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{
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int y,m,d,s,f;
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s=0;
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printf("请输入一个日期（YYYY-MM-DD）：");
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scanf("%d-%d-%d",&y,&m,&d);
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if(y%4==0&&y%100!=0||y%400==0)
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f=1;
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else
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f=0;
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switch(m-1)
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{
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/**********Program**********/
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case 11: s+=30;
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case 10: s+=31;
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case 9: s+=30;
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case 8: s+=31;
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case 7: s+=31;
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case 6: s+=30;
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case 5: s+=31;
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case 4: s+=30;
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case 3: s+=31;
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case 2: s+=f+28;
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case 1: s+=31;
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/********** End **********/
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}
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s=s+d ;
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printf("%d-%d-%d是这一年中的第%d天\n",y,m,d,s);
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}
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