一道java编程题：编程求出自然数1~100之间所有素数。输出所有素数及个数。输出素数时要求每五个一行。 java 如何输出1到100间的质数
\u7528java\u7f16\u7a0b\uff1a\u8f93\u5165\u4e00\u4e2a\u6b63\u6574\u6570n\uff0c\u8f93\u51fan\u4ee5\u5185\u7684\u6240\u6709\u7d20\u6570\u3002\u4ee3\u7801\u600e\u4e48\u5199\uff1fpublic class HelloWorld { public static void main(String[] args) { System.out.println("\u8bf7\u8f93\u5165\u4e00\u4e2a\u6b63\u6574\u6570n"); Scanner input = new Scanner(System.in); int n = input.nextInt(); for (int i = 2; i <= n; i++) // 1\u4e0d\u662f\u7d20\u6570\uff0c\u6240\u4ee5\u76f4\u63a5\u4ece2\u5f00\u59cb\u5faa\u73af { int j = 2; while (i % j != 0) { j++; // \u6d4b\u8bd52\u81f3i\u7684\u6570\u5b57\u662f\u5426\u80fd\u88abi\u6574\u9664\uff0c\u5982\u4e0d\u80fd\u5c31\u81ea\u52a0 } if (j == i) //\u5f53\u6709\u88ab\u6574\u9664\u7684\u6570\u5b57\u65f6\uff0c\u5224\u65ad\u5b83\u662f\u4e0d\u662f\u81ea\u8eab,\u82e5\u662f\uff0c\u5219\u8bf4\u660e\u662f\u7d20\u6570 { System.out.println(i); // \u5982\u679c\u662f\u5c31\u6253\u5370\u51fa\u6570\u5b57 } } }}
\u53c2\u8003\u4ee3\u7801\u5982\u4e0b\uff1a
package test;
public class Test {
public static void main(String[] args) {
int j;
for (int i = 2; i <= 100; i++) // 1\u4e0d\u662f\u7d20\u6570\uff0c\u6240\u4ee5\u76f4\u63a5\u4ece2\u5f00\u59cb\u5faa\u73af
{
j = 2;
while (i % j != 0)
j++; // \u6d4b\u8bd52\u81f3i\u7684\u6570\u5b57\u662f\u5426\u80fd\u88abi\u6574\u9664\uff0c\u5982\u4e0d\u80fd\u5c31\u81ea\u52a0
if (j == i) // \u5f53\u6709\u88ab\u6574\u9664\u7684\u6570\u5b57\u65f6\uff0c\u5224\u65ad\u5b83\u662f\u4e0d\u662f\u81ea\u8eab
System.out.println(i); // \u5982\u679c\u662f\u5c31\u6253\u5370\u51fa\u6570\u5b57
}
}
}
\u6269\u5c55\u8d44\u6599\uff1a
\u8d28\u6570\u53c8\u79f0\u7d20\u6570\u3002\u4e00\u4e2a\u5927\u4e8e1\u7684\u81ea\u7136\u6570\uff0c\u9664\u4e861\u548c\u5b83\u81ea\u8eab\u5916\uff0c\u4e0d\u80fd\u6574\u9664\u5176\u4ed6\u81ea\u7136\u6570\u7684\u6570\u53eb\u505a\u8d28\u6570\uff1b\u5426\u5219\u79f0\u4e3a\u5408\u6570\u3002
Java\u662f\u4e00\u95e8\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\u8bed\u8a00\uff0c\u4e0d\u4ec5\u5438\u6536\u4e86C++\u8bed\u8a00\u7684\u5404\u79cd\u4f18\u70b9\uff0c\u8fd8\u6452\u5f03\u4e86C++\u91cc\u96be\u4ee5\u7406\u89e3\u7684\u591a\u7ee7\u627f\u3001\u6307\u9488\u7b49\u6982\u5ff5\uff0c\u56e0\u6b64Java\u8bed\u8a00\u5177\u6709\u529f\u80fd\u5f3a\u5927\u548c\u7b80\u5355\u6613\u7528\u4e24\u4e2a\u7279\u5f81\u3002Java\u8bed\u8a00\u4f5c\u4e3a\u9759\u6001\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\u8bed\u8a00\u7684\u4ee3\u8868\uff0c\u6781\u597d\u5730\u5b9e\u73b0\u4e86\u9762\u5411\u5bf9\u8c61\u7406\u8bba\uff0c\u5141\u8bb8\u7a0b\u5e8f\u5458\u4ee5\u4f18\u96c5\u7684\u601d\u7ef4\u65b9\u5f0f\u8fdb\u884c\u590d\u6742\u7684\u7f16\u7a0b\u3002
System.out.println("100内的素数为：");
int k=0;
loop: for (int i = 2; i < 100; i++) {
for (int j = 2; j < i; j++) {
if (i % j == 0) {
continue loop;
}
}
k++;
if(k/5==k/5.0)
{
System.out.println(" " + i);
} else{
System.out.print(" " + i);
}
}
}
换行了。
public class Sushu {
public static void main(String[] args) {
System.out.println("100内的素数为：");
loop:
for (int i = 2; i < 100; i++) {
for (int j = 2; j < i; j++) {
if (i % j == 0) {
continue loop;
}
}
System.out.print(" " + i);
}
}
}
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