possible eight-letter combinations

This is a discussion on possible eight-letter combinations within the C Programming forums, part of the General Programming Boards category; // this code should generate all possible eight-letter combinations from an eight-digit phone number. The procedure doesn't check if the ...

  1. #1
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    Sep 2005
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    7

    possible eight-letter combinations

    // this code should generate all possible eight-letter combinations from an eight-digit phone number. The procedure doesn't check if the phone number contains 0's or 1's.

    Code:
    #include<iostream>
    using namespace std;
    
    const char* letters[] = {
        "ABC",
        "DEF",
        "GHI",
        "JKL",
        "MNO",
        "PRS",
        "TUV",
        "WXY"
    };
    FILE* fp;
    char str1[15];
    
    void GenCombinations (
        const char* number,
        char str[]) 
    {
        if (*number == '\0')
        {
    	fwrite(str - 8, 1, 8, fp);
    	cout<<str<<endl;
    	fwrite("\r\n", 1, 2, fp);
    	return;
        }
        else if (*number == '-')
    	GenCombinations(number + 1, str);
        else {
    	const int group = *number - '0' - 2;
    	for (int i = 0; i < 3; i++)
    	{
    	    *str = letters[group][i];
    	    cout<<str<<endl;
    	    GenCombinations(number + 1, str + 1);
    	}
        }
    }
    int main(){
        char str2[]="42472888";
        strcat("\0",str2);
        GenCombinations(str2,str1);
         cout<<str1<<endl;
           system("PAUSE");
        return 0;
        }

  2. #2
    &TH of undefined behavior Fordy's Avatar
    Join Date
    Aug 2001
    Posts
    5,789
    Please dont cross post

    Replies - i dont know what is wrong with it (help plz)

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