初始化内容

third/midifile/tools/tohex.cpp

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+//
+// Programmer:    Craig Stuart Sapp <craig@ccrma.stanford.edu>
+// Creation Date: Tue Dec  9 20:36:13 PST 1997
+// Last Modified: Tue Jan 27 21:23:56 GMT-0800 1998
+// Filename:      tools/tohex.cpp
+// URL:           https://github.com/craigsapp/midifile/blob/master/tools/tohex.cpp
+// Syntax:        C++11
+// vim:           ts=3
+//
+// Description:   Convert decimal value to hex.
+//
+
+#include <cctype>
+#include <cstdio>
+#include <cstdlib>
+#include <cstring>
+#include <iomanip>
+#include <iostream>
+
+using namespace std;
+
+
+int   atohd       (const char* aNumber);
+void  exitUsage   (const char* command);
+
+
+///////////////////////////////////////////////////////////////////////////
+
+int main(int argc, char* argv[]) {
+	if (argc != 2) {
+		exitUsage(argv[0]);
+	}
+
+	int aValue;
+	aValue = atohd(argv[1]);
+	cout << "0x" << hex << aValue << endl;
+
+	return 0;
+}
+
+
+///////////////////////////////////////////////////////////////////////////
+
+//////////////////////////////
+//
+// atohd -- ASCII hex code byte to integer.
+//
+
+int atohd(const char* aNumber) {
+	if (strchr(aNumber, 'x') != NULL) {
+		return (int)strtol(aNumber, (char**)NULL, 16);
+	} else {
+		return atoi(aNumber);
+	}
+}
+
+
+
+//////////////////////////////
+//
+// exitUsage --
+//
+
+void exitUsage(const char* command) {
+		cout << endl;
+		cout << "Converts an integer into hexadecimal form.\n";
+		cout << endl;
+		cout << "Usage: " << command << " integer" << endl;
+		cout << endl;
+		cout << "   integer = [-2147483648..2147483647] \n";
+		cout << "             [-0x80000000..0x7fffffff] \n";
+		cout << endl;
+		exit(1);
+}
+
+
+