系统编程文件部分

Chapter13/io/stdio/mycpy.c

@@ -0,0 +1,51 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+/**
+ * @brief
+ * @details
+ *          usage: ./mycpy <src> <dst>
+ *
+ * @return  int
+ */
+
+int main(int argc, char **argv)
+{
+    FILE *fps, *fpd;
+    int   ch;
+
+    if (argc < 3)
+    {
+        fprintf(stderr, "Usage:%s <src> <dst>\n", argv[0]);
+        exit(1);
+    }
+
+    fopen(argv[1], "r");
+    if (NULL == fps)
+    {
+        perror("fopen()");
+        exit(1);
+    }
+
+    fopen(argv[2], "w");
+    if (NULL == fpd)
+    {
+        // !!!
+        fclose(fps);
+        perror("fopen()");
+        exit(1);
+    }
+
+    while (1)
+    {
+        ch = fgetc(fps);
+        if (EOF == ch)
+            break;
+        fputc(ch, fpd);
+    }
+
+    fclose(fpd);
+    fclose(fps);
+
+    exit(0);
+}