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Merge pull request #1812 from Kumar-laxmi/pilot
Pushing Edit distance algorithm in C
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,41 @@ | ||
| #include <stdio.h> | ||
| #include <string.h> | ||
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| // Function to find minimum of three numbers | ||
| int min(int x, int y, int z) { | ||
| return (x < y) ? (x < z ? x : z) : (y < z ? y : z); | ||
| } | ||
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| // A Naive recursive C program to find minimum number | ||
| // of operations to convert s1 to s2 | ||
| int editDistRec(char *s1, char *s2, int m, int n) { | ||
| // If first string is empty, the only option is to | ||
| // insert all characters of second string into first | ||
| if (m == 0) return n; | ||
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| // If second string is empty, the only option is to | ||
| // remove all characters of first string | ||
| if (n == 0) return m; | ||
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| // If last characters of two strings are same, nothing | ||
| // much to do. Get the count for | ||
| // remaining strings. | ||
| if (s1[m - 1] == s2[n - 1]) | ||
| return editDistRec(s1, s2, m - 1, n - 1); | ||
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| // If last characters are not same, consider all three | ||
| // operations on last character of first string, | ||
| // recursively compute minimum cost for all three | ||
| // operations and take minimum of three values. | ||
| return 1 + min(editDistRec(s1, s2, m, n - 1), // Insert | ||
| editDistRec(s1, s2, m - 1, n), // Remove | ||
| editDistRec(s1, s2, m - 1, n - 1) // Replace | ||
| ); | ||
| } | ||
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| int main() { | ||
| char s1[] = "GEEXSFRGEEKKS"; | ||
| char s2[] = "GEEKSFORGEEKS"; | ||
| printf("%d\n", editDistRec(s1, s2, strlen(s1), strlen(s2))); | ||
| return 0; | ||
| } |
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