//#include “stdio.h” //void main() // 10的階乘 /{ int i,t=1; for(i=1;i<=10;i++) t=ti; printf (“10!=%d”,t); }/ /{ int i=1,t=1; while (i<=10) { t*=i; i++; } printf(“10!=%d”,t); } */

// 乘法口訣 /{ int x,y; for (x=1;x<=9;x++) { for (y=1;y<=9;y++) printf("%3d%d=%2d",x,y,xy); printf("\n"); } }

/{ int x,y; for (x=1;x<=9;x++) { for (y=1;y<=x;y++) //x改為y printf("%3d%d=%2d",x,y,xy); printf("\n"); } }/

//計算x以內最大的5個能被12或15整除的自然數之和，x的值由鍵盤輸入。 /{ int x,m=0,n=0; printf (“x=”); scanf ("%d",&x); while (n<5) { if (x%120||x%150) { m+=x; n++; x–; } printf (“sum=%d”,m); } }/

/#include “stdio.h” #include “math.h” main() { int sign=1,count=0; double pi=0,n=1.0,term=1.0; while (fabs(term)>=1e-6) { count++; n=n+2; pi=pi+term; sign=-sign; term=sign

/#include “stdio.h” #include “math.h” void main() { double term=1,sign=1,n=1,sum=0; while (fabs(term)<102) { sign=-sign; n=n+2; term=signn; sum=sum+term; } printf(“sum=%d”,sum); }*/

#include “stdio.h” void main() { double i,t=1,n=3; for (n=3;n<=18;n+=3) { for (i=1;i<=n;i++) { t*=i; } } printf(“sum=%d”,t); }