#include <perms.h>

//          Edinburgh IMP77 Compiler - Version 8.4
//
//     1  %BEGIN

int main(int argc, char **argv) { /*%begin*/
  _imp_initialise(argc, argv);

  //     2  %INTEGER I,J

  int I;
  int J;

  //     3  %OWNSTRING(15)FAILED="TEST OK"

  static _imp_string15 FAILED = _imp_str_init("TEST OK");

  //     4  %RECORDFORMAT F(%INTEGER I,J)

  struct F {
    union {
      struct {
        int I;
        int J;
      };
    };
  };

  auto void INTERCHANGE(struct F * R, int P, int Q);

  //     5  %ROUTINESPEC INTERCHANGE(%RECORD(F)%ARRAYNAME A,%INTEGER I,J)
  //     6  %RECORD(F)%ARRAY A(0:3)

  struct F A[4];

  //     7  %RECORD(F)%ARRAY B(1:4)

  struct F B[4];

  //     8        %CYCLE I=0,1,3

  // %for I = 0, 1, 3 %cycle
  {
    I = -1;
  L_0001:
    if (I == 3) goto L_0002;
    I += 1;

    //     9           A(I)_I=I

    A[I].I = I;

    //    10           B(I+1)_I=I+1

    B[I + 1 - 1].I = I + 1;

    //    11        %REPEAT

    goto L_0001;
  }

L_0002:;

//    12        INTERCHANGE(A,1,3)

  INTERCHANGE(A, 1, 3);

  //    13        Failed="***BUG FOUND" %UNLESS A(1)_I=3 %AND A(3)_I=1

  if (A[1].I != 3) goto L_0003;
  if (A[3].I == 1) goto L_0004;
L_0003:;

  _imp_strncpy(/*?*/ &FAILED, ({
                 __typeof__(_imp_string255) tmp; /*B*/
                 tmp = _imp_str_literal("***BUG FOUND");
                 (void *)&tmp;
               }),
               /*max:*/ 15);

L_0004:;

//    14        INTERCHANGE(B,1,3)

  INTERCHANGE(B, 1, 3);

  //    15        Failed="***BUG FOUND" %UNLESS B(1)_I=3 %AND B(3)_I=1

  if (B[0].I != 3) goto L_0005;
  if (B[2].I == 1) goto L_0006;
L_0005:;

  _imp_strncpy(/*?*/ &FAILED, ({
                 __typeof__(_imp_string255) tmp; /*B*/
                 tmp = _imp_str_literal("***BUG FOUND");
                 (void *)&tmp;
               }),
               /*max:*/ 15);

L_0006:;

//    16         printstring(failed)

  _imp_PRINTSTRING(
      *({
        __typeof__(_imp_string15) tmp = FAILED /*q*/;
        (_imp_string255 *)&tmp;
      })
  );

  //    17  %ROUTINE INTERCHANGE(%RECORD(F)%ARRAYNAME R,%INTEGER P,Q)

  void INTERCHANGE(struct F * R, int P, int Q) {
    //    18  %RECORD(F) TEMP

    struct F TEMP;

    //    19        TEMP=R(P)

    TEMP = [/*BUG*/ 0];

    //    20        R(P)=R(Q)

    [/*BUG*/ 0] = [/*BUG*/ 0];

    //    21        R(Q)=TEMP

    [/*BUG*/ 0] = TEMP;

    //    22  %END

    return;
  } /* end of INTERCHANGE */

  //    23  %ENDOFPROGRAM

  _imp_stop(0);
  return 0;
end_0:;
}