C語言編程題目.doc

.1、 編程實現(xiàn)：從鍵盤輸入3個變量的值，其中中a=5，b=6,c=7，然后將3個變量的值進(jìn)行交換，使得a=6,b=7,c=5.#includestdio.hvoid main()int a,b,c,m;printf(Enter a,b,c:);scanf(%d,%d,%d,&a,&b&c);m=a;a=b;b=c;c=m;printf(a=%d,b=%d,c=%dn,a,b,c);2、 編程實現(xiàn)：輸入任意一個3位數(shù)，將其各位數(shù)字反序輸出（例如：輸入123，輸出321）。#includestdio.hvoid main()int a,b,c,x,y;printf(輸入一個3位數(shù)：n);scanf(%d,&x);a=x%10;b=x/100;c=x%100/10;y=a*100+c*10+b;printf(%dn,y);3、 編程實現(xiàn)：輸入三角形的邊長，求三角形面積（面積=sqrt(s(s-a)(s-b)(s-c），s=(a+b+c)/2.#include#includevoid main()int a,b,c;float x,y;scanf(%d,%d,%d,&a,&b,&c);x=(a+b+c)/2;y=sqrt(s*(s-a)*(s-b)*(s-c);printf(%.3fn,y);4、 編程實現(xiàn)：從鍵盤上輸入一個年月日，要求出該天是該年的第幾天（注意判斷該年是否是閏年）。#includevoid main()inta,b,c;printf(輸入一個年月日：);scanf(%d%d%d,&a,&b,&c);if(a%4=0|a%100=0)switch(b)case 1: printf(%dn,c);break;case 2: printf(%dn,31+c);break;case 3: printf(%dn,60+c);break;case 4:printf(%dn,91+c);break;case 5:printf(%dn,121+c);break;case 6:printf(%dn,152+c);break;case 7:printf(%dn,182+c);break;case 8:printf(%dn,213+c);break;case 9: printf(%dn,244+c);break;case 10: printf(%dn,274+c);break;case 11: printf(%dn,305+c);break;case 12: printf(%dn,335+c);break;elseswitch(b)case 1: printf(%dn,c);break;case 2: printf(%dn,31+c);break;case 3: printf(%dn,59+c);break;case 4: printf(%dn,90+c);break;case 5: printf(%dn,120c);break;case 6: printf(%dn,151+c);break;case 7: printf(%dn,181+c);break;case 8: printf(%dn,212+c);break;case 9: printf(%dn,243+c);break;case 10: printf(%dn,273+c);break;case 11: printf(%dn,304+c);break;case 12: printf(%dn,334+c);break;5、 求n!(1!+2!+3!+.+25!)。（n從1到25）#includevoid main()float sum=1,term=0;for(i=1;i=25;i+)sum=sum*i;term=term+sum;printf(%d,%fn,i,term);6、 編寫一個判斷素數(shù)的函數(shù)，在主函數(shù)輸入一個整數(shù)，輸出是否是素數(shù)的信息。#includeint f(int,a);void main()int a,y;scanf(%d,&a);if(a2)printf(輸入有誤：);elseif(a=2)printf(a為素數(shù)：);elsey=f(a);if(y=1)printf(a為素數(shù)：);elseprintf(a不為素數(shù)：);7、 鍵盤輸入10個整數(shù)，用冒泡排序法按從小到大的順序輸出。#includevoid main()int i,m,a10;for(i=0;i10;i+)scanf(%d,&ai);for(i=0;