Clarify my doubt

What is the problem in my code?
Request to provide more typical test cases

@rajeev071999 hey rajeev can I see your code so that I can provide the test cases ?

#include
#include
using namespace std;
char genchar(char s)
{
int i;
char c;
i=s-‘0’;
i–;
c=‘a’+i;
return c;
}
char genchar(char s1,char s2)
{
int i,j,num;
char c;
i=s1-‘0’;
j=s2-‘0’;
num=i*10+j;
num–;
c=‘a’+num;
return c;
}
void gencodes(char *inp,char *outp,int i,int j,int len)
{
if(i==len)
{
outp[j]=’\0’;
cout<<outp<<endl;
return;
}
if(inp[i]!=‘0’)
{
outp[j]=genchar(inp[i]);
gencodes(inp,outp,i+1,j+1,len);
}
if(i<len-1)
{
int k;
k=inp[i+1]-‘0’;
if(inp[i]==‘0’)
{
outp[j]=genchar(inp[i+1]);

		gencodes(inp,outp,i+2,j+1,len);
	}
	if(inp[i]=='1')
	{
		outp[j]=genchar(inp[i],inp[i+1]);
        //Modification:
        gencodes(inp,outp,i+2,j+1,len);
	}
	else if(inp[i]=='2' && k<7)
	{
		outp[j]=genchar(inp[i],inp[i+1]);
        //Modification:
        gencodes(inp,outp,i+2,j+1,len);
	}
	// gencodes(inp,outp,i+2,j+1,len);
	
}
return;

}
int main()
{
char inp[1000],outp[1000];
cin>>inp;
gencodes(inp,outp,0,0,strlen(inp));
return 0;
}

@rajeev071999
Please send your code on CB IDE

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