Good afternoon. what's the meaning of returning non-zero from main?
Code:/* strindex: return index of t in s, -1 if none */ #include <stdio.h> #include "Headers/strings.h" #include "Strings/strindex.c" #include "Strings/getline.c" #ifndef MAXLINE #define MAXLINE 1000 #endif static const char pattern[] = "ould"; int found; int main(void) { char line[MAXLINE]; while(getLine(line,MAXLINE) > 0) if(strindex(line, pattern) >= 0) printf("%s", line); found++; return found; }