504. Base 7

1,题目要求
将一个数转化为7进制的数
这里写图片描述
注意转化为一个字符串。
2,题目思路
对于负数,要进行记录并将其转化为正数再进行操作。
跟在十进制时获得每一位的数字时的方法相同,只不过将10变为7即可。
3,程序源码

class Solution {
public:
    string convertToBase7(int num) {
        if(num < 0)
            return '-' + convertToBase7(-num);
        if(num < 7)
            return to_string(num);
        return convertToBase7(num / 7) + to_string(num% 7 );
    }
};

to_string方法将int型的数据转化为string类型。

!SESSION 2025-09-01 15:44:44.798 ----------------------------------------------- eclipse.buildId=4.6.0.I20160606-1100 java.version=10.0.1 java.vendor=Oracle Corporation BootLoader constants: OS=win32, ARCH=x86_64, WS=win32, NL=zh_CN Framework arguments: -product org.eclipse.epp.package.jee.product Command-line arguments: -os win32 -ws win32 -arch x86_64 -product org.eclipse.epp.package.jee.product !ENTRY org.eclipse.osgi 4 0 2025-09-01 15:44:58.648 !MESSAGE Application error !STACK 1 org.eclipse.e4.core.di.InjectionException: java.lang.NoClassDefFoundError: javax/annotation/PostConstruct at org.eclipse.e4.core.internal.di.InjectorImpl.internalMake(InjectorImpl.java:386) at org.eclipse.e4.core.internal.di.InjectorImpl.make(InjectorImpl.java:294) at org.eclipse.e4.core.contexts.ContextInjectionFactory.make(ContextInjectionFactory.java:162) at org.eclipse.e4.ui.internal.workbench.swt.E4Application.createDefaultHeadlessContext(E4Application.java:490) at org.eclipse.e4.ui.internal.workbench.swt.E4Application.createDefaultContext(E4Application.java:504) at org.eclipse.e4.ui.internal.workbench.swt.E4Application.createE4Workbench(E4Application.java:203) at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:626) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:336) at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:604) at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:148) at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:138) at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:134) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:388) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:243) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.base/java.lang.reflect.Method.invoke(Unknown Source) at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:673) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:610) at org.eclipse.equinox.launcher.Main.run(Main.java:1519) at org.eclipse.equinox.launcher.Main.main(Main.java:1492) Caused by: java.lang.NoClassDefFoundError: javax/annotation/PostConstruct at org.eclipse.e4.core.internal.di.InjectorImpl.inject(InjectorImpl.java:151) at org.eclipse.e4.core.internal.di.InjectorImpl.internalMake(InjectorImpl.java:375) ... 23 more Caused by: java.lang.ClassNotFoundException: javax.annotation.PostConstruct cannot be found by org.eclipse.e4.core.di_1.6.0.v20160319-0612 at org.eclipse.osgi.internal.loader.BundleLoader.findClassInternal(BundleLoader.java:398) at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:361) at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:353) at org.eclipse.osgi.internal.loader.ModuleClassLoader.loadClass(ModuleClassLoader.java:161) at java.base/java.lang.ClassLoader.loadClass(Unknown Source) ... 25 more !ENTRY org.eclipse.e4.ui.workbench 4 0 2025-09-01 15:44:58.665 !MESSAGE FrameworkEvent ERROR !STACK 0 java.lang.NoClassDefFoundError: javax/annotation/PreDestroy at org.eclipse.e4.core.internal.di.InjectorImpl.disposed(InjectorImpl.java:426) at org.eclipse.e4.core.internal.di.Requestor.disposed(Requestor.java:154) at org.eclipse.e4.core.internal.contexts.ContextObjectSupplier$ContextInjectionListener.update(ContextObjectSupplier.java:78) at org.eclipse.e4.core.internal.contexts.TrackableComputationExt.update(TrackableComputationExt.java:111) at org.eclipse.e4.core.internal.contexts.TrackableComputationExt.handleInvalid(TrackableComputationExt.java:74) at org.eclipse.e4.core.internal.contexts.EclipseContext.dispose(EclipseContext.java:176) at org.eclipse.e4.core.internal.contexts.osgi.EclipseContextOSGi.dispose(EclipseContextOSGi.java:106) at org.eclipse.e4.core.internal.contexts.osgi.EclipseContextOSGi.bundleChanged(EclipseContextOSGi.java:139) at org.eclipse.osgi.internal.framework.BundleContextImpl.dispatchEvent(BundleContextImpl.java:903) at org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:230) at org.eclipse.osgi.framework.eventmgr.ListenerQueue.dispatchEventSynchronous(ListenerQueue.java:148) at org.eclipse.osgi.internal.framework.EquinoxEventPublisher.publishBundleEventPrivileged(EquinoxEventPublisher.java:213) at org.eclipse.osgi.internal.framework.EquinoxEventPublisher.publishBundleEvent(EquinoxEventPublisher.java:120) at org.eclipse.osgi.internal.framework.EquinoxEventPublisher.publishBundleEvent(EquinoxEventPublisher.java:112) at org.eclipse.osgi.internal.framework.EquinoxContainerAdaptor.publishModuleEvent(EquinoxContainerAdaptor.java:156) at org.eclipse.osgi.container.Module.publishEvent(Module.java:476) at org.eclipse.osgi.container.Module.doStop(Module.java:634) at org.eclipse.osgi.container.Module.stop(Module.java:498) at org.eclipse.osgi.container.SystemModule.stop(SystemModule.java:191) at org.eclipse.osgi.internal.framework.EquinoxBundle$SystemBundle$EquinoxSystemModule$1.run(EquinoxBundle.java:165) at java.base/java.lang.Thread.run(Unknown Source) Caused by: java.lang.ClassNotFoundException: javax.annotation.PreDestroy cannot be found by org.eclipse.e4.core.di_1.6.0.v20160319-0612 at org.eclipse.osgi.internal.loader.BundleLoader.findClassInternal(BundleLoader.java:398) at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:361) at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:353) at org.eclipse.osgi.internal.loader.ModuleClassLoader.loadClass(ModuleClassLoader.java:161) at java.base/java.lang.ClassLoader.loadClass(Unknown Source) ... 21 more !SESSION 2025-09-01 15:45:13.969 ----------------------------------------------- eclipse.buildId=4.6.0.I20160606-1100 java.version=10.0.1 java.vendor=Oracle Corporation BootLoader constants: OS=win32, ARCH=x86_64, WS=win32, NL=zh_CN Framework arguments: -product org.eclipse.epp.package.jee.product Command-line arguments: -os win32 -ws win32 -arch x86_64 -product org.eclipse.epp.package.jee.product !ENTRY org.eclipse.osgi 4 0 2025-09-01 15:45:20.390 !MESSAGE Application error !STACK 1 org.eclipse.e4.core.di.InjectionException: java.lang.NoClassDefFoundError: javax/annotation/PostConstruct at org.eclipse.e4.core.internal.di.InjectorImpl.internalMake(InjectorImpl.java:386) at org.eclipse.e4.core.internal.di.InjectorImpl.make(InjectorImpl.java:294) at org.eclipse.e4.core.contexts.ContextInjectionFactory.make(ContextInjectionFactory.java:162) at org.eclipse.e4.ui.internal.workbench.swt.E4Application.createDefaultHeadlessContext(E4Application.java:490) at org.eclipse.e4.ui.internal.workbench.swt.E4Application.createDefaultContext(E4Application.java:504) at org.eclipse.e4.ui.internal.workbench.swt.E4Application.createE4Workbench(E4Application.java:203) at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:626) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:336) at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:604) at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:148) at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:138) at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:134) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:388) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:243) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.base/java.lang.reflect.Method.invoke(Unknown Source) at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:673) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:610) at org.eclipse.equinox.launcher.Main.run(Main.java:1519) at org.eclipse.equinox.launcher.Main.main(Main.java:1492) Caused by: java.lang.NoClassDefFoundError: javax/annotation/PostConstruct at org.eclipse.e4.core.internal.di.InjectorImpl.inject(InjectorImpl.java:151) at org.eclipse.e4.core.internal.di.InjectorImpl.internalMake(InjectorImpl.java:375) ... 23 more Caused by: java.lang.ClassNotFoundException: javax.annotation.PostConstruct cannot be found by org.eclipse.e4.core.di_1.6.0.v20160319-0612 at org.eclipse.osgi.internal.loader.BundleLoader.findClassInternal(BundleLoader.java:398) at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:361) at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:353) at org.eclipse.osgi.internal.loader.ModuleClassLoader.loadClass(ModuleClassLoader.java:161) at java.base/java.lang.ClassLoader.loadClass(Unknown Source) ... 25 more !ENTRY org.eclipse.e4.ui.workbench 4 0 2025-09-01 15:45:20.405 !MESSAGE FrameworkEvent ERROR !STACK 0 java.lang.NoClassDefFoundError: javax/annotation/PreDestroy at org.eclipse.e4.core.internal.di.InjectorImpl.disposed(InjectorImpl.java:426) at org.eclipse.e4.core.internal.di.Requestor.disposed(Requestor.java:154) at org.eclipse.e4.core.internal.contexts.ContextObjectSupplier$ContextInjectionListener.update(ContextObjectSupplier.java:78) at org.eclipse.e4.core.internal.contexts.TrackableComputationExt.update(TrackableComputationExt.java:111) at org.eclipse.e4.core.internal.contexts.TrackableComputationExt.handleInvalid(TrackableComputationExt.java:74) at org.eclipse.e4.core.internal.contexts.EclipseContext.dispose(EclipseContext.java:176) at org.eclipse.e4.core.internal.contexts.osgi.EclipseContextOSGi.dispose(EclipseContextOSGi.java:106) at org.eclipse.e4.core.internal.contexts.osgi.EclipseContextOSGi.bundleChanged(EclipseContextOSGi.java:139) at org.eclipse.osgi.internal.framework.BundleContextImpl.dispatchEvent(BundleContextImpl.java:903) at org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:230) at org.eclipse.osgi.framework.eventmgr.ListenerQueue.dispatchEventSynchronous(ListenerQueue.java:148) at org.eclipse.osgi.internal.framework.EquinoxEventPublisher.publishBundleEventPrivileged(EquinoxEventPublisher.java:213) at org.eclipse.osgi.internal.framework.EquinoxEventPublisher.publishBundleEvent(EquinoxEventPublisher.java:120) at org.eclipse.osgi.internal.framework.EquinoxEventPublisher.publishBundleEvent(EquinoxEventPublisher.java:112) at org.eclipse.osgi.internal.framework.EquinoxContainerAdaptor.publishModuleEvent(EquinoxContainerAdaptor.java:156) at org.eclipse.osgi.container.Module.publishEvent(Module.java:476) at org.eclipse.osgi.container.Module.doStop(Module.java:634) at org.eclipse.osgi.container.Module.stop(Module.java:498) at org.eclipse.osgi.container.SystemModule.stop(SystemModule.java:191) at org.eclipse.osgi.internal.framework.EquinoxBundle$SystemBundle$EquinoxSystemModule$1.run(EquinoxBundle.java:165) at java.base/java.lang.Thread.run(Unknown Source) Caused by: java.lang.ClassNotFoundException: javax.annotation.PreDestroy cannot be found by org.eclipse.e4.core.di_1.6.0.v20160319-0612 at org.eclipse.osgi.internal.loader.BundleLoader.findClassInternal(BundleLoader.java:398) at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:361) at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:353) at org.eclipse.osgi.internal.loader.ModuleClassLoader.loadClass(ModuleClassLoader.java:161) at java.base/java.lang.ClassLoader.loadClass(Unknown Source) ... 21 more
最新发布
09-02
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