?? staticvariablesinfunctions.cpp
字號:
//: C10:StaticVariablesInfunctions.cpp
// From Thinking in C++, 2nd Edition
// Available at http://www.BruceEckel.com
// (c) Bruce Eckel 2000
// Copyright notice in Copyright.txt
#include "../require.h"
#include <iostream>
using namespace std;
char oneChar(const char* charArray = 0) {
static const char* s;
if(charArray) {
s = charArray;
return *s;
}
else
require(s, "un-initialized s");
if(*s == '\0')
return 0;
return *s++;
}
char* a = "abcdefghijklmnopqrstuvwxyz";
int main() {
// oneChar(); // require() fails
oneChar(a); // Initializes s to a
char c;
while((c = oneChar()) != 0)
cout << c << endl;
} ///:~
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