Question

I’m trying to write a function that is able to determine whether a string contains a real or an integer value.

This is the simplest solution I could think of:

int containsStringAnInt(char* strg){   for (int i =0; i < strlen(strg); i++) {if (strg[i]=='.') return 0;}   return 1; } 

But this solution is really slow when the string is long… Any optimization suggestions? Any help would really be appreciated!

Answer 1

You are using strlen, which means you are not worried about unicode. In that case why to use strlen or strchr, just check for ‘\0’ (Null char)

int containsStringAnInt(char* strg){     for (int i =0;strg[i]!='\0'; i++) {       if (strg[i]=='.') return 0;}      return 1; } 

Only one parsing through the string, than parsing through the string in each iteration of the loop.