2.Output an Image

src/write_file_util.rs

@@ -0,0 +1,12 @@
+use std::{fs::File, io::{BufWriter, Write}};
+
+pub fn write_image(content: String, file_path: String) {
+    if let Ok(file) = File::create(file_path) {
+        let mut writer = BufWriter::new(file);
+        if let Err(e) = writer.write(content.as_bytes()) {
+            println!("写出失败：{:#}", e)
+        }
+    } else {
+        println!("PPM保存失败")
+    }
+}