题目描述
将一个正整数分解质因数。例如：输入90,打印出90 = 2 * 3 * 3 * 5。
public static String acquirePrime(int num){
StringBuilder sb = new StringBuilder();
int cursor =2;
while (cursor<=num){
if (cursor==num){
sb.append(num);
break;
}else if (num % cursor == 0){
sb.append(cursor).append("*");
num = num / cursor;
}else {
cursor++;
}
}
return sb.toString();
}
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