如题，题主是个超级菜鸟的新手，已经改对了一道题了，实在是剩下的不知道错哪了。

救救！

下面是我的代码

（跪谢）

#include<stdio.h>
#include<math.h>
#include<iostream>
#define PI 3.141593
using namespace std;
int main ()
{
	char x;
	x=getchar();
	if(x=='1')
		printf("I love Luogu!");
	else if(x=='2')
		printf("6 4");
	else if(x=='3')
		printf("3\n12\n2\n");
	else if(x=='4'){
		float y;
		y=500/3.0;
		printf("%3.3f",y);
	}
	else if(x=='5'){
		int t;
		t=(260+220)/32;
		printf("%d",t);
	}
	else if(x=='6'){
		float l;
		l=sqrt(6*6+9*9);
		cout << l << endl;
		return 0;
	}
	else if(x=='7'){
		int one,two,three;
		one=100+10;
		two=one-20;
		three=two-two;
		printf("%d\n%d\n%d\n",one,two,three);
	}
	else if(x=='8'){
		int r=5;
		double C,S,V;
		C=2*PI*r;
		S=PI*r*r;
		V=4.0/3*PI*r*r*r;
		cout<<C<<"\n"<<endl;
		cout<<S<<"\n"<<endl;
		cout<<V<<"\n"<<endl;
			}
	else if(x=='9'){
		int e,f,g,h;
		h=1;
		g=(h+1)*2;
		f=(g+1)*2;
		e=(f+1)*2;
		printf("%d",e);
	}
	else if(x=='10'){
		int z,m,v;  
		z=(240-60)/24;
		m=240-30*z;
		v=(m+10*z)/10;
		printf("%d",v);
	}
	else if(x=='11'){
		int T;
		T=100/3;
		printf("%d",T);
	}
	else if(x=='12'){
		printf("13\nQ");
		
	}
	else if(x=='13'){
		double tiji;
		tiji=4.0/3*PI*4*4*4;
		double L=pow(tiji,1.0/3);
		printf("%.0ld",L);
	} 
	else{
		double price;
		price=(100-sqrt(100*100-4*2400))/2;
		printf("%.0lf",price);
	}
	return 0;
}