/* This program is for checking a single integer*/ #include #include main() { int a,i; printf("\nEnter a positive integer\n"); scanf("%d",&a); if(a<=0) { printf("\nInvalid input\n"); exit(1); } for(i=2;i<=a-1;i++) if(a%i==0)break; if(i==a)printf("\n%d is prime\n",a); else printf("\n%d is not a prime\n",a); } /* This is for elements in an array*/ #include #include #define MAX 5 main() { int a[MAX],i,m; printf("\nEnter elements into array\n"); for(m=0;m<=MAX-1;m++) { ...