Merge pull request #20 from ar-rafi-087/patch-2

create file.c

Author: MdHRShohel

file.c

@@ -0,0 +1,12 @@
+#include<stdio.h>
+
+int main(){
+    FILE *ptr;
+    int i;
+    ptr = fopen("q5.txt", "r");
+    fscanf(ptr, "%d", &i);
+    ptr = fopen("q5.txt", "w");
+    fprintf(ptr, "%d", i*2);
+    fclose(ptr);
+    return 0;
+}