Compare Version Numbers

Compare numbers version1 and version1.
If version1 > version2 return 1, if version1 < version2 return-1, otherwise ret Urn 0.

Assume that the version strings is non-empty and contain only digits and the.Character.
The.Character does not represent a decimal point and was used to separate number sequences.
For instance,2.5is not "both and a half" or "half-to-version three", it is the fifth Second-level revision of the second first-level re Vision.

Here are an example of version numbers ordering:

0.1 < 1.1 < 1.2 < 13.37

Credits:
Special thanks to @ts for adding this problem and creating all test cases.

#include <stdio.h> #include <string.h>int compareversion (char *version1, char *version2) {int I, j, K, dat    A1 = 0, data2 = 0;  for (i = 0,j = 0; version1[i]! = ' version2[j ' && version2[j]! = ' ';) {if (version1[i] = = '. ' &&] == '.')            {if (Data1 > Data2) return 1;            if (Data1 < data2) return-1;            data1 = 0;            data2 = 0;            i++;        j + +; } else if (version1[i]! = '. ' && version2[j] = = '. ')                {while (version1[i]! = '. ' && version1[i]! = ' + ') {data1 = data1*10 + version1[i]-' 0 ';            i++;        } if (version1[i]== ') break; } else if (version1[i] = = '. ' && version2[j]! = '. ')                {while (version2[j]! = '. ' && version2[j]! = ' + ') {data2 = data2*10 + version2[j]-' 0 ';            j + +;        } if (version2[j]== ') break;   } else{         Data1 = data1*10 + version1[i]-' 0 ';            Data2 = data2*10 + version2[j]-' 0 ';            i++;        j + +; }} if (version1[i] = = ' && version2[j]! = ' \ ") {if (version2[j] = = '. ')            {k=j+1;            if (Data1 > Data2) return 1;            if (Data1 < data2) return-1;        if (data1 = = data2) data1 = 0;        } else k=j;        if (version2[k-1] = = '. ') data2 = 0; while (version2[k]! = ' ' && version2[k]! = '. ')            {data2 = data2*10 + version2[k]-' 0 ';        k++; }} else if (version1[i]! = ' \ "&& version2[j] = = ' + ') {if (version1[i] = = '. ')            {k=i+1;            if (Data1 > Data2) return 1;            if (Data1 < data2) return-1;        if (data1 = = data2) data2 = 0;        } else k=i;        if (version1[k-1] = = '. ') data1 = 0; while (version1[k]! = ' ' && version1[k]! = '. ') {data1 = data1*10 + version1[k]-' 0 ';        k++;    }} if (Data1 > Data2) return 1;    if (Data1 < data2) return-1; if (data1 = = data2) return 0;} void Main () {printf ("%d\n", Compareversion ("1.0", "13.37"));}

Compare Version Numbers