初始化内容

third/midifile/tools/tobin.cpp

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+//
+// Programmer:    Craig Stuart Sapp <craig@ccrma.stanford.edu>
+// Creation Date: Wed Jan 28 00:22:15 GMT-0800 1998
+// Last Modified: Wed Jan 28 00:22:20 GMT-0800 1998
+// Filename:      tools/tobin.cpp
+// URL:           https://github.com/craigsapp/midifile/blob/master/tools/tobin.cpp
+// Syntax:        C++11
+// vim:           ts=3
+//
+// Description:   Convert binary numbers to decimal.
+//
+
+#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]);
+
+	for (int i=0; i<32; i++) {
+		if ((aValue >> (31-i)) & 0x01) {
+			cout << "1";
+		} else {
+			cout << "0";
+		}
+		if (i%4 == 3) cout << " ";
+	}
+	cout << endl;
+
+	return 0;
+}
+
+
+
+//////////////////////////////
+//
+// atohd --
+//
+
+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 binary form.\n";
+		cout << endl;
+		cout << "Usage: " << command << " integer" << endl;
+		cout << endl;
+		cout << "   integer = [-2147483648..2147483647] \n";
+		cout << "             [-0x80000000..0x7fffffff] \n";
+		cout << endl;
+		exit(1);
+}
+
+
+