'commit'

C++专题课程/基础知识/判断素数.cpp

@@ -0,0 +1,23 @@
+#include<bits/stdc++.h>
+using namespace std;
+
+int is_sushu(int n) {
+	int i, mid;
+	mid=(int)sqrt(n);
+	for(i=2; i<=mid; i++)
+		if(0 == n%i)
+			return 0;
+	return 1;
+}
+int main() {
+	int n;
+
+	printf("Enter a num: ");
+	scanf("%d", &n);
+	if(is_sushu(n))
+		printf("%d is sushu!\n", n);
+	else
+		printf("%d is not sushu...\n", n);
+	return 0;
+}
+