新文件： 1.c

	新文件：   2.c

Author: DataEraserC

1.c

@@ -0,0 +1,21 @@
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+int main(int argc,char *argv[])
+{
+//	printf("%s\n",str(1));
+	if (argc != 3)
+	{
+		printf("Plz input 2 str,and I will do a strcat\n");
+		return 0;
+	}
+    printf("argv[1]=%s\nargv[2]=%s\n",argv[1],argv[2]);
+	printf("strcat(argv[1],argv[2])=%s\n\n",strcat(argv[1],argv[2]));
+    printf("strlen(argv[1])=%d\n",strlen(argv[1]));
+    printf("strlen(argv[2])=%d\n",strlen(argv[2]));
+    char str[strlen(argv[1])+1];
+    printf("str[i]\ni=%d\n\n",sizeof(str)/sizeof(str[0]));
+    sprintf(str,"%s%s",argv[1],argv[2]);
+  	printf("sprintf(str,\"%s%s\",argv[1],argv[2])\nstr=%s\n","%s","%s",str);
+	return 0;
+}

2.c

@@ -0,0 +1,20 @@
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+int main()
+{
+		char a[4]="111",b[6]="222";
+  		char c[3] = {'3','3'};
+		printf("a=%s\n",a);
+		printf("b=%s\n",b);
+		printf("c=%s\n",c);
+//		char c[] = strcat(a,b);
+		strcat(c,a);
+		c[4]='4';
+		printf("strcat(a,b)=%s\n",strcat(a,b));
+		printf("a'=%s\n",a);
+		printf("la=%lu\n",sizeof(a)/sizeof(a[0]));
+		printf("c'=%s\n",c);
+		return 0;
+}
+