Question

why my if else if else if statement is not working?

   printf ("Enter 1 for midtern1 sorting , 2 for midterm2 sorting , 3 for final sorting\n");
   scanf ("%d",sort);

   if (sort=1){
      midterm1(x);
      for (i=9;i>=0;i--){
      printf ("%s %s %d\n",x[i].name,x[i].surname,x[i].mid1);}}
   else if (sort=2){
        midterm2(x);
        for (i=9;i>=0;i--){
        printf ("%s %s %d\n",x[i].name,x[i].surname,x[i].mid2);}}
   else if (sort=3){
        final(x);
        for (i=9;i>=0;i--){
        printf ("%s %s %d\n",x[i].name,x[i].surname,x[i].final);}}

i tried (sort==1), (sort<=1) but still same result.

Answer 1

Two problems:

(1) Instead of

 if (sort=1)

you probably want

 if (sort==1)

similar for all of your if-statements. Reminder, '=' is assignment, '==' is used for Boolean comparisons.

(2)

scanf ("%d", sort);
             ^

needs &

scanf ("%d", &sort);
             ^

Both of these are unfortunately common problems/mistakes .. if you crank up the warning level of your compiler, it may help you avoid some of these.