Using - C
  
 Source Code
  

    
#include<stdio.h>

int checkPrime(int x);
void printPrime(int range_start, int range_end);

void main(){
	int n,i;
	printf("Enter a number: ");
	scanf("%d",&n);
	
	if(checkPrime(n))
		printf("%d is a prime number!\n",n);
	else
		printf("%d is not a prime number!\n",n);
	
	printf("\nPrinting all Prime Numbers upto 100: \n");
	printPrime(1,100);	

}


int checkPrime(int x) {
	int i;
		if(x==1 || x==0)			// So that Program won't crash
			return 0;
		else {
			for(i=2; i <= x/2; i++) {
				if(x%i==0) {
				return 0;
				}
			}
		}
	return 1;	
}

void printPrime(int range_start, int range_end) {
	int i;
	for(i=range_start; i <= range_end; i++) {
		if(checkPrime(i)==1){
			printf("%d   ",i);
		}
	}
}

    

Enter a number: 11
11 is a prime number!
  
Printing all Prime Numbers upto 100:
2    3    5    7    11    13    17    19    23    29    31    37    41    43    47    53    59    61    67    71    73    79    83    89    97

        
Using - C++
        
 Source Code
        

        
          #include<iostream>
          using namespace std;

          class PrimeNumbers{
            public: 
            int checkPrime(int x);
            void printPrime(int range_start, int range_end);
          };
          
          int PrimeNumbers::checkPrime(int x) {
              if(x==1 || x==0)			// So that Program won't crash
                return 0;
              else {
                for(int i=2; i <= x/2; i++) {
                  if(x%i==0) {
                  return 0;
                  }
                }
              }
            return 1;	
          }
          
          void PrimeNumbers::printPrime(int range_start, int range_end) {
            for(int i=range_start; i <= range_end; i++) {
              if(checkPrime(i)==1) {
                cout<< i<< "   ";
              }
            }
          }
          
          
          int main(){
            int n;
            PrimeNumbers object;
            cout<< "Enter a number: ";
            cin>> n;
              
              if(object.checkPrime(n))
                cout<< n<< " is a prime number!"<< endl;
              else
                cout<< n<< " is not a prime number!"<< endl;
            
            cout<< "\nPrinting all Prime Numbers upto 100: "<< endl;		
            object.printPrime(1,100);
            return 0;
              
          }
      

Enter a number: 8
8 is not a prime number!
  
Printing all Prime Numbers upto 100:
2    3    5    7    11    13    17    19    23    29    31    37    41    43    47    53    59    61    67    71    73    79    83    89    97