上面诸葛先生已经把算法说明白了，我就把程序代码写出来吧
void main()
{
unsigned int i, n;
printf("please enter an integer: ");
scanf("%u", &n);
if (n < 2) {
printf("the integer must be greater than 1.\n");
return;
}
for (i = 2; i <= n/2; i++) {
if (n % i == 0) {
printf("%u is not a prime number.\n", n);
return;
}
}
printf("%u is a prime number.\n", n);
}
答：第一题： #include prime() {int m,k,i,n=0; for(m=2;m=k+1) {printf("%d ",m);n+=1;} if...详情>>
问：挺简单的一C函数，不过我是初学者，暂时还不会写，请好心人多多帮忙！
答：int mystrlen(char *str) { int n = 0; while (*str) { n++; str++;} return n; } voi...详情>>
