fcopy

.vscode/launch.json

+{
+    // Use IntelliSense to learn about possible attributes.
+    // Hover to view descriptions of existing attributes.
+    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+    "version": "0.2.0",
+    "configurations": [
+        {
+            "type": "lldb",
+            "request": "launch",
+            "name": "Debug",
+            "program": "${workspaceFolder}/<executable file>",
+            "args": [],
+            "cwd": "${workspaceFolder}"
+        }
+    ]
+}
\ No newline at end of file

fcopy.c

+#include<stdio.h>
+int main(){
+    FILE *fp1,*fp2;
+    fp1 = fopen("helloworld.c","r");
+    fp2 = fopen("overwrite.c","w");
+    while(1){
+        char c = fgetc(fp1);
+        if(c!=EOF){
+            fputc(c,fp2);
+        }else{
+            break;
+        }
+    }printf("file content copied successfully.\n");
+    fclose(fp1);
+    fclose(fp2);
+}
\ No newline at end of file

overwrite.c

+#include<stdio.h>
+int main()
+{
+    printf("Hello World !");
+    return 0;
+}
\ No newline at end of file