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  1. #include <stdio.h>
  2.  
  3. int compVersions ( const char * version1, const char * version2 ) {
  4. 	unsigned major1 = 0, minor1 = 0, bugfix1 = 0;
  5. 	unsigned major2 = 0, minor2 = 0, bugfix2 = 0;
  6. 	sscanf(version1, "%u.%u.%u", &major1, &minor1, &bugfix1);
  7. 	sscanf(version2, "%u.%u.%u", &major2, &minor2, &bugfix2);
  8. 	if (major1 < major2) return -1;
  9. 	if (major1 > major2) return 1;
  10. 	if (minor1 < minor2) return -1;
  11. 	if (minor1 > minor2) return 1;
  12. 	if (bugfix1 < bugfix2) return -1;
  13. 	if (bugfix1 > bugfix2) return 1;
  14. 	return 0;
  15. }
  16.  
  17.  
  18. int main ( ) {
  19.     struct {
  20.         const char * version1;
  21.         const char * version2;
  22.     } testVersions[] = {
  23.         { "a141.1.23", "141.1.22" },
  24.         { "141.1.23", "145.1.22" },
  25.         { "141.2.23", "141.1.23" },
  26.         { "141.1.0", "141.1" }
  27.     };
  28.  
  29.     size_t testCount = sizeof(testVersions) / sizeof(testVersions[0]);
  30.     for (size_t i = 0; i < testCount; i++) {
  31.         int res = compVersions(
  32.             testVersions[i].version1, testVersions[i].version2);
  33.         printf("%s %s %s\n", 
  34.             testVersions[i].version1, 
  35.             (res == 0 ? "=" : res == -1 ? "<" : ">"),
  36.             testVersions[i].version2);
  37.     }
  38.     return 0;
  39. }
Success #stdin #stdout 0s 5284KB
comments (?)
stdin
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Standard input is empty
stdout
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a141.1.23 < 141.1.22
141.1.23 < 145.1.22
141.2.23 > 141.1.23
141.1.0 = 141.1
https://ideone.com/Qe08TN
language:
C (gcc 8.3)
created:
6 days ago
visibility:
public

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