帮我解决这歌头痛的问题？

[zhenzhizhe]

#include <iostream>
using namespace std;
int SubStrNum(char *str,char *substr)
{
int NUM=0;
int h1,h2;
int p1,p2;
h1=strlen(str);
h2=strlen(substr);

for(p2=0;p2<h2;p2++)
{
if(str[p2]=substr[p1])

NUM++;
if (p1==h1-1)
break;
}
return NUM;

}
void main ()
{
char *str,*substr;
cout<<"input the str:"<<endl;
cin>>str;
cout<<"input the substr:"<<endl;
cin>>substr;
cout<<SubStrNum(str,substr)<<endl;
}

[zhenzhizhe]

当程序运行的时候会有错误，不知道什么原因？ 帮帮忙

[fosjos]

第一步：char str[20],substr[20];

[wuyu637]

char *str = new char[100]；
char*substr = new char[100]；


指针初始化。。。谢谢。。

[飞哥]

#include <iostream>
using namespace std;
int SubStrNum(char *str,char *substr)
{
int NUM=0;
int h1,h2;
int p1,p2;
h1=strlen(str);
h2=strlen(substr);

for(p2=0;p2 <h2;p2++)
{
if(str[p2]=substr[p1]) // take care '==", not "="

NUM++;
if (p1==h1-1)
break;
}
return NUM;

}
void main ()
{
char *str,*substr; //this is the root cause; your pointers have no memory. you can use array.
cout < <"input the str:" < <endl;
cin>>str;
cout < <"input the substr:" < <endl;
cin>>substr;
cout < <SubStrNum(str,substr) < <endl;
}

[wuyu637]

int NUM=0;
int h1,h2;
int p1=0,p2=0;

-----------------------------变量初始化。。

[独孤过儿]

燕大哥好久不见了啊！最近忙什么呢？

[zhenzhizhe]

同意变量初始化

[zhenzhizhe]

#include <iostream>
using namespace std;
int SubStrNum(char *str,char *substr)
{
char *str=new str[100];
char *substr=new str[100];
int NUM=0;
int h1,h2;
int p1=0,p2;
h1=strlen(str);
h2=strlen(substr);

for(p2=0;p2<h2;p2++)
{
if(str[p2]==substr[p1])
NUM++;
if (p1==h1-1)
break;
}
return NUM;
delete str;
delete substr;

}
void main ()
{
char *str,*substr;
cout<<"input the str:"<<endl;
cin>>str;
cout<<"input the substr:"<<endl;
cin>>substr;
cout<<SubStrNum(str,substr)<<endl;
}
再还有什么小问题？

[hityct1]

void main ()
{
char *str,*substr;
cout < <"input the str:" < <endl;
cin>>str; //指针指向了哪里？
cout < <"input the substr:" < <endl;
cin>>substr; //指针指向了哪里？
cout < <SubStrNum(str,substr) < <endl;
}

[jieao111]

你怎么在SubStrNum里分配内存，，还有char *str=new str[100];
char *substr=new str[100]; 写法也不对

#include  <iostream> 
using namespace std; 
int SubStrNum(char *str,char *substr) 
{
int NUM=0; 
int h1,h2; 
int p1=0,p2; 
h1=strlen(str); 
h2=strlen(substr); 

for(p2=0;p2 <h2;p2++) 
{ 
if(str[p2]==substr[p1]) 
NUM++; 
 if  (p1==h1-1) 
break; 
} 
return NUM; 
delete str; 
delete substr; 

} 
void main () 
{ 
char *str=new char[100]; 
char *substr=new char[100]; 


cout<<"input the str:"<<endl; 
cin>>str; 
cout<<"input the substr:"<<endl; 
cin>>substr; 
cout<<SubStrNum(str,substr)<<endl; 
} 

[jerryhgc]

正解！楼上的书写很严谨噢，学习一下~~
[Quote=引用 10 楼 jieao111 的回复:]
你怎么在SubStrNum里分配内存，，还有char *str=new str[100];
char *substr=new str[100]; 写法也不对
C/C++ code#include <iostream>
using namespace std;
int SubStrNum(char *str,char *substr)
{
int NUM=0;
int h1,h2;
int p1=0,p2;
h1=strlen(str);
h2=strlen(substr);

for(p2=0;p2 <h2;p2++)
{
if(str[p2]==substr[p1])
NUM++;
if (p1==h1-1)
break;
}
return NUM;
delete s…
[/Quote]

[queshangxintou]

以上各位已经说的很清楚了
你这个程序编译器都会有警告的
你先把警告都改掉都能解决问题
另外你一步步跟一下就知道原因出在那了

[zhenzhizhe]

谢谢
慢慢学习

[liveforme]

lz加油