cout << user<<" is not a prime number."; } cout <<"\n\nPress enter to exit...";getchar();getchar();return0; } Sorry if this is too localised (in which case could you suggest where I should ask such specific questions?) I should add that I am VERY new to C++ (and progr...
fp<<"There are only 1 prime number within 2.\n"; fp<<"2\n"; fp.close(); cout<<"Congratulations! It has worked out!\n"; return 0; } else { int j; int sq; fp.open("prime.txt",ios::in|ios::out|ios::trunc); fp<<"2\t\t"; n++; for(int i=3;i<=m;i+=2) { sq...
int is_prime_number (int n) { long c; if (n < 2) return FALSE; for (c = 2; c < n; c++) { if ((n % c) == 0) return FALSE; } return TRUE; } It would be better to ask questions like this in comp.programmin g next time. However, it does appear that the function ...
http://en.allexperts.com/q/C-1040/finding-prime-numbers-1-1.htm That person takes a number and moduluses it by all of the numbers greater than 1 and less than itself. If the two numbers tested come out to be an even divide (the modulus of the two numbers equals zero) then the nu...
In any case we have been talking about a small coding challenge to complicate the discussion. After all facts seldom solve anything but they do add to the discussion. Someone suggested that we both write a program to find the next prime number after 2.2 billion. Sounded like fun to ...
But in order for it to be prime, the loop must continue checking all the other values of i. 1234567891011121314151617181920 unsigned long a; cout<<"Enter a number: "; cin>>a; bool prime = true; for (int i=2; i<a; i++) { if (a%i == 0) { prime = false; break; } } if...
(fp);/* display contents of primes.dat file */fp=fileopen(fname,"rt","");printf("Prime numbers in primes.dat file:\n");while(fscanf(fp,"%d",&i)!=EOF)printf("%d ",i);fclose(fp);return0;/* test if n is a prime number */intis_prime(intn)intd;for(d=2;d<n;d++){if(...
关於素数的一点 (a..素数,亦称质数,指在一个大於1的自然数中,除了1和此整数自身外,无法被其他自然数整除的数。换句话说,只有两个正因数(1和自己)的自然数即为素数。素数这个概念 , 这个估计大家都不陌生 , 因为小学
Here, in this tutorial you will learn C++ program to check whether the entered number is a prime number or not by using the if-else statements.
Using symbols, a number n > 1 is prime if it cannot be written as a product of two integers a and b, both of which are larger than 1:n = a · b. The crucial importance of prime numbers to number theory and mathematics in general stems from the fundamental theorem of arithmetic ...