PROGRAM TO INPUT A NUMBER AND CHOICE BY THE USER TO FIND FACTORIAL OF THE NUMBER || PRIME OR NOT || EVEN OR ODD (MENU-DRIVEN)
// CLICK THE PIC TO ENLARGE IT #include<stdio.h> #include<conio.h> void main() { int a,i,ch,f=1,count=0; clrscr(); while(f==1) { printf("ENTER A NUMBER\n"); scanf("%d",&a); if(a<0) printf("WRONG INPUT"); else { printf("ENTER 1 FOR CALCULATING WHETHER A NUMBER IS FACTORIAL OR NOT\n"); printf("ENTER 2 FOR CALCULATING WHETHER A NUMBER IS PRIME OR NOT\n"); printf("ENTER 3 FOR CALCULATING WHETHER A NUMBER IS EVEN OR ODD\n"); printf("ENTER ANY OTHER NO.1 FOR EXIT\n"); scanf("%d",&ch); switch(ch) { case 1: for(i=1;i<=a;i++) f=f*i; printf("FACTORIAL OF %d = %d \n",a,f); break; case 2: for( i=1;i<=a;i++) { if(a%i==0) count ++; } if(count==2) printf("ENTERED NUMBER IS A PRIME NUMBER \n"); else printf("ENTERED NUMBER IS NOT A PRIME NUMBER \n"); break; case 3: if(a%2==0) printf(...