我的学习记录

#include#include#includeusing namespace std;void main(){ //long long int i,n,m;/* cin>>n>>m; double result=0.0; for(i=n;i<=m;i++) { result+=1.0/(i*i); }*/ double result=424; cout<<showp

isdigit只能一个一个的转换字符格式，sscanf也不能转化位置个数的字符，所以输入时就还是一个一个的输入，#include#include#include#include#pragma warning(disable:4996)using namespace std;void main(){ char s[100],t[100]; int i,j=0,n=0,res

刚开始用了个笨方法，用fgers输入所有字符串后，计算长度。第二种是输入时用scanf循环一个一个的输入字符串，并在这个过程计算每个单词的长度和个数/*#include#include#include#include#pragma warning(disable:4996)void main(){ char s[1000]; char ch; int n=0,i,j; in

结束要enter ctr+z enter#include#include#pragma warning(disable:4996)void main(){ int num[100],ta=0,tm=0,x,n=0,temp=0,flag=0,result[100];//tm最大次数 int m=1; while(scanf("%d",&x)==1)//给数组赋值 num[n+

很简单#include#include#includeusing namespace std;void main(){ int i=1,j=1; double result=0.0; while(j) { result+=1.0/(2*i-1)*pow(-1,i-1); if(1.0/(2*i-1)<pow(10,-6)) j=0; i++; } cou

c++里对浮点数小数点后位数的确定，不添加fixed，只有setprecision函数，那么3是包括小数点所占的位，添加fixed后，就是小数点后位数。还有showpoint就是显示小数点#include#include#includeusing namespace std;void main(){ int n; cin>>n; double H=0.0; for(int i

#include#includeusing namespace std;void main(){ int a,b,c; cin>>a>>b>>c; double d; d=(a+0.0)/b; cout<<fixed<<setprecision(c)<<d<<endl; system("pause");}

#include#pragma warning(disable:4996)//#define LOCALvoid main(){#ifdef LOCAl freopen("in.txt","r",stdin); freopen("out.txt","w",stdout);#endif int n,m,i,j=0; scanf("%d",&n); int a[100]; fo

很简单，让我想复杂了#include#pragma warning(disable:4996)#includeusing namespace std;void main(){ int n; cin>>n; for(int i=1;i<=n;i++) { for(int j=0;j<i-1;j++) printf(" "); for(int k=1;k<=2*n-

/*#include#pragma warning(disable:4966)void main(){ for(int n=100;n<1000;n++) { int ge=n%10; int shi=(n/10)%10; int bai=n/100; int s=ge*ge*ge+shi*shi*shi+bai*bai*bai; if(s==n) printf