Initial commit

ifelse2.m

@@ -0,0 +1,10 @@
+c = input ('请输入字母','s');
+if c >= 'A' && c <= 'Z'
+    disp(lower(c));
+elseif  c >= 'a' && c <= 'z'
+    disp(upper(c));
+elseif c >='0' && c <='9'
+    disp(str2double(c)^2);
+else
+    disp(c);
+end