diff --git "a/\346\237\257\345\260\217\346\226\214/\346\226\207\344\273\266\350\257\273\345\206\231\344\270\213/.keep" "b/\346\237\257\345\260\217\346\226\214/\346\226\207\344\273\266\350\257\273\345\206\231\344\270\213/.keep"
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git "a/\346\237\257\345\260\217\346\226\214/\346\226\207\344\273\266\350\257\273\345\206\231\344\270\213/demo.js" "b/\346\237\257\345\260\217\346\226\214/\346\226\207\344\273\266\350\257\273\345\206\231\344\270\213/demo.js"
new file mode 100644
index 0000000000000000000000000000000000000000..5b45a7581b4490f58ca68ec7280ecc782c286e1a
--- /dev/null
+++ "b/\346\237\257\345\260\217\346\226\214/\346\226\207\344\273\266\350\257\273\345\206\231\344\270\213/demo.js"
@@ -0,0 +1,37 @@
+let sum = "rtyuiopasdfghjklzxcvbnm";
+let fs = require("fs");
+let fd = fs.openSync("xxx.txt", 'w');
+for (let i = 0; i < 100; i++) {
+    let long = Math.ceil(Math.random()*10);
+    let kongSum = '';
+    for (let j = 0; j < long; j++) {
+        let suiSum = Math.ceil(Math.random() * sum.length);
+        kongSum += sum.charAt(suiSum);
+    }
+    fs.writeSync(fd, kongSum, { flag: 'a' })
+}
+fs.closeSync(fd);
+
+let newSum = [];
+let rs = fs.createReadStream('xxx.txt', 'utf-8');
+rs.on("data", (chunk) => {
+    console.log(chunk);
+    let newSum1 = chunk;
+    for (let k = 0; k < newSum1.length; k++) {
+        if (newSum[newSum1[k]]) {
+            newSum[newSum1[k]]++;
+        }else{
+            newSum[newSum1[k]]=1;
+        }
+    }
+        var char = '';
+        var max = 0;
+        for(var key in newSum){
+            if(max < newSum[key]){
+                max = newSum[key]
+                char = key;
+            }
+        }
+        console.log("此次出现最多的字符是"+char);
+    });
+   
\ No newline at end of file