描述
Given two strings A and B, whose alphabet consist only ‘0’ and ‘1’. Your
task is only to tell how many times does A appear as a substring of B? For example, the text string B is ‘1001110110’ while the pattern string A is ‘11’, you should output 3, because the pattern A appeared at the posit
输入
The first line consist only one integer N, indicates N cases follows. In each case, there are two lines, the first line gives the string A, length (A) <= 10, and the second line gives the string B, length (B) <= 1000. And it is guaranteed that B is always longer than A.
输出
For each case, output a single line consist a single integer, tells how many times do B appears as a substring of A.
样例输入
3
11
1001110110
101
110010010010001
1010
110100010101011
样例输出
3
0
Given two strings A and B, whose alphabet consist only ‘0’ and ‘1’. Your
task is only to tell how many times does A appear as a substring of B? For example, the text string B is ‘1001110110’ while the pattern string A is ‘11’, you should output 3, because the pattern A appeared at the posit
输入
The first line consist only one integer N, indicates N cases follows. In each case, there are two lines, the first line gives the string A, length (A) <= 10, and the second line gives the string B, length (B) <= 1000. And it is guaranteed that B is always longer than A.
输出
For each case, output a single line consist a single integer, tells how many times do B appears as a substring of A.
样例输入
3
11
1001110110
101
110010010010001
1010
110100010101011
样例输出
3
0
3
#include<iostream>
#include<string>
using namespace std;
string model,match;
int count()
{
int cnt=0,i,len1=match.length(),j,len2=model.length();
for(i=0;i<len1;i++)
{
if(match[i]==model[0])
{
for(j=1;j<len2&&model[j]==match[i+j];j++);
if(j==len2)
cnt++;
}
}
return cnt;
}
int main()
{
//freopen("b.txt","r",stdin);
int t;
cin>>t;
while(t--)
{
cin>>model>>match;
cout<<count()<<endl;
}
return 0;
}
函数名 描述
find 查找
rfind 反向查找
find_first_of 查找包含子串中的任何字符,返回第一个位置
find_first_not_of 查找不包含子串中的任何字符,返回第一个位置
find_last_of 查找包含子串中的任何字符,返回最后一个位置
find_last_not_of 查找不包含子串中的任何字符,返回最后一个位置
#include<iostream>
#include<string>
using namespace std;
int main()
{
freopen("b.txt","r",stdin);
string s1,s2;
int n;
cin>>n;
while(n--)
{
cin>>s1>>s2;
unsigned int m=s2.find(s1,0);
int num=0;
while(m!=string::npos)
//while(m!s2.npos)
{
num++;
m=s2.find(s1,m+1);
}
cout<<num<<endl;
}
return 0;
}
#include <string>
#include <iostream>
using namespace std;
void main()
{
////find函数返回类型 size_type
string s("1a2b3c4d5e6f7g8h9i1a2b3c4d5e6f7g8ha9i");
string flag;
string::size_type position;
//find 函数 返回jk 在s 中的下标位置
position=s.find("jk");
cout<<"position is : "<<position<<endl;
//find 函数 返回flag 中任意字符 在s 中第一次出现的下标位置
flag="c";
position=s.find_first_of(flag);
cout<<"s.find_first_of(flag) is : "<<position<<endl;
//从字符串s 下标5开始,查找字符串b ,返回b 在s 中的下标
position=s.find("b",5);
cout<<"s.find(b,5) is : "<<position<<endl;
//查找s 中flag 出现的所有位置。
flag="a";
position=0;
int i=1;
while((position=s.find_first_of(flag,position))!=string::npos)
{
//position=s.find_first_of(flag,position);
cout<<"position "<<i<<" : "<<position<<endl;
position++;
i++;
}
//查找flag 中与s 第一个不匹配的位置
flag="acb12389efgxyz789";
position=flag.find_first_not_of (s);
cout<<"flag.find_first_not_of (s) :"<<position<<endl;
//反向查找,flag 在s 中最后出现的位置
flag="3";
position=s.rfind (flag);
cout<<"s.rfind (flag) :"<<position<<endl;
}
511

被折叠的 条评论
为什么被折叠?



