c語言考試常用算法docx

求1~100的累加和#includevoid main(){inti=1,sum=0;while (i<=100){sum+=i;i++;}printf("sum=%d\n",sum);}求階乘#include"stdio.h"void main(){inti,n;long p=1;printf("enter n:");scanf("%d",&n);for (i=1;i<=n;i++)p*=i;printf("p=%ld\n",p);}輸入一個小于六位的整數(shù)，判斷是幾位數(shù)，并按照逆序輸出#includevoid main(){inta,b,c,d,e,h;int n;printf ("input n:");scanf("%ld",&n);a=n/10000;b=n%10000/1000;c=n%1000/100;d=n%100/10;e=n%10;if(a!=0) h=5;else if(b!=0) h=4; else if(c!=0) h=3;else if(d!=0) h=2;else if(e!=0) h=1;else h=0;printf("%ld是%d位數(shù)\n",n,h);switch(h){case 5:printf("%d%d%d%d%d\n",e,d,c,b,a);break;case 4:printf("%d%d%d%d\n",e,d,c,b);break;case 3:printf("%d%d%d\n",e,d,c);break;case 2:printf("%d%d\n",e,d);break;case 1:printf("%d\n",e);break;default:printf("no input.\n");}}自編#include void main (){inta,b,c,d,e,f,g,n,w,x,y,z;printf("請輸入一個小于六位數(shù)的正整數(shù):\n");scanf("%d",&n);g=n/10;if (g==0) printf("這個數(shù)為一位數(shù)\n");else if (g>0&&g<10){ printf("這個數(shù)為兩位數(shù)\n");a=n%10;b=n/10;printf("%d%d\n",a,b);}else if (g>=10&&g<100){printf("這個數(shù)為三位數(shù)\n");a=n%10;w=n/10;b=w%10;c=n/100;printf("%d%d%d\n",a,b,c);}else if (g>=100&&g<1000){ printf("這個數(shù)為四位數(shù)\n");a=n%10;w=n/10;b=w%10;x=n/100;c=x%10;d=b/1000;printf("%d%d%d%d\n",a,b,c,d);}else if (g>=1000&&g<10000){ printf("這個數(shù)為五位數(shù)\n");a=n%10; w=n/10;b=w%10;x=n/100;c=x%10;z=n/1000;d=z%10;e=n/10000;printf("%d%d%d%d%d\n",a,b,c,d,e);}elseprintf("輸入錯誤");}將五個數(shù)存放到一維數(shù)組中，再將這五個數(shù)按逆序存放在同一數(shù)組中輸出#include #define N 5void main(){inti,j,t,a[N];for (i=0;i#includevoid main(){intx,y;intm,n,r;scanf("%d,%d",&x,&y);m=abs(x);n=abs(y);if(m#include void main(){float x,x0,x1;printf("input x:\n");scanf("%f",&x);x1=x/2;/*初值*/do{x0=x1;x1=(x0+x/x0)/2;}while (fabs(x0

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