我运行此代码时输出错误*****
package gain_per;
import java.util.Scanner;
public class Gain {
public static void main(String[] args) {
Scanner sn = new Scanner(System.in);
int op,rc,sp,cost,gain;
double gp=0;
System.out.println("Enter Old Price:");
op = sn.nextInt();
System.out.println("Enter Repair cost:");
rc = sn.nextInt();
System.out.println("Enter Selling Price:");
sp = sn.nextInt();
if(op != 0 && rc != 0 && sp != 0) {
cost = op+rc;
if(cost<sp) {
gain = sp-cost;
gp = (float)((gain / cost) * 100);
System.out.println(gp);
}
else {
System.out.println("Cannot Calculate");
}
}
else {
System.out.println("Invalid Input");
}
}
}
这是我的代码!!!这有什么问题?我得到的输出是0.0
因为增益是int,成本也是int,增益/成本将返回int,如果增益低于成本则增益/成本= 0.你需要施放如:((浮动)增益)/成本,来表达变为float / int,将返回float
这是因为你正在对int
进行划分,这将给zero
。所以你需要做的是首先将gain
和cost
浮动然后乘以它,例如:gp = (((float) gain / (float) cost) * 100);
完整代码:
package gain_per;
import java.util.Scanner;
public class Gain {
public static void main(String[] args) {
Scanner sn = new Scanner(System.in);
int op,rc,sp,cost,gain;
double gp=0;
System.out.println("Enter Old Price:");
op = sn.nextInt();
System.out.println("Enter Repair cost:");
rc = sn.nextInt();
System.out.println("Enter Selling Price:");
sp = sn.nextInt();
if(op != 0 && rc != 0 && sp != 0) {
cost = op+rc;
if(cost<sp) {
gain = sp-cost;
gp = (((float) gain / (float) cost) * 100);
System.out.println(gp);
}
else {
System.out.println("Cannot Calculate");
}
}
else {
System.out.println("Invalid Input");
}
}
}