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Php Check is date or not

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C Program to check prime number

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C Program to  check prime number  #include<conio.h> #include<stdio.h> void main() {     int p,i;     clrscr();     printf("enter no. to check prime: ");     scanf("%d",&p);     for(i=2;i<p;i++)     if(p%i==0)     {         printf("%d is not a prime number ",p);         break;     }     if(i==p)     printf("%d is prime number",p);     getch(); } Explanation int p,i;       p and i are two variables of integer type ; printf() and scanf() are predefine functions use for read and write respectively. for(i=2;i<p;i++) for loop use to check prime number  count  if(p%i== 0) if p % i = 0 then it means 'p' has any common factor between 1 to p which means it is not a prime...
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C Program for Analog Clock Design

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C Program to  Create Analog clock #include<conio.h> #include<graphics.h> #include<math.h> #include<dos.h> #define WBC 5 //^watchbackcolor #define X 200 #define Y 200 void dial(int x, int y); void sechand(int timeminute); void minhand(int t) { int x1,y1; setlinestyle(0,0,3); x1= X+ (80 * cos(t*0.1047)); y1= Y+ (80 * sin(t*0.1047)); setcolor(BLACK); line( X, Y, x1, y1); setcolor(WBC+1); line( X, Y, X+ 80 * cos((t-1)*0.1047),Y+ 80 * sin((t-1)*0.1047)); circle(X,Y,4); } void sechand(int t) { int x1,y1; setlinestyle(0,0,3); x1= X+(100 * cos(t*0.1047)); y1= Y+(100 * sin(t*0.1047)); setcolor(RED); line(X, Y, x1, y1); setcolor(WBC+1); line(X, Y, X+ 100 * cos((t-1)*0.1047),Y+ 100 * sin((t-1)*0.1047)); circle(X,Y,4); } void dial(int x,int y) { int const size=200; setfillstyle(1,WBC); fillellipse(x,y,size,size); setfillstyle(1,WBC+1); fillellipse(x,y,size-20,size-20); outtextxy(x,y-(size-40),"12"); out...
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