CamelCase in C

Example for versions gcc 3.4.5, gcc 4.2.4, tcc 0.9.25

This example is based on character-wise string processing. fgets here reads at most 99 characters into the string, and stops when it finds end-of-string character, so a long line might be split. C doesn’t provide boolean data type, so it has to be simulated using integer variable.

#include <stdio.h>
void main() {
 char text[100],cc[100];
 fgets(text, sizeof text, stdin);
 int i,j=0,lastSpace=1;
 for (i=0; text[i]!='0円'; i++) 
 if (text[i]>='A' && text[i]<='Z' || text[i]>='a' && text[i]<='z')
 { if (lastSpace>0)
 cc[j] = toupper(text[i]);
 else
 cc[j] = tolower(text[i]);
 j++;
 lastSpace = 0;
 }
 else
 lastSpace = 1;
 cc[j]='0円';
 printf("%s\n",cc);
}