'commit'

C++专题课程/质数相关/saixuan.cpp

@@ -0,0 +1,21 @@
+#include<cstdio>
+#define MAXN 2000001
+int a[MAXN],i,j;
+int main() {
+	int m;
+	while(scanf("%d",&m) == 1 && m!=0) {
+		for(i = 2; i <= m; i++)
+			a[i] =i;
+		for(i = 2; i <= m/2; i++) {
+			if(a[i] != 0) {
+				for(j=i+i; j <= m; j += i) {
+					a[j] = 0;
+				}
+			}
+		}
+		for(i = 2; i <= m; i++) {
+			if(a[i] != 0) printf("%d\n",a[i]);
+		}
+	}
+	return 0;
+}