[求助] 还是上个压杆稳定程序,编译连接通过但运行未响应,大神来...

 PROGRAM main
        
      PARAMETER(PI=3.1415926)
        REAL E1,E2,Js1,Js2,Os1,Os2,Ob1,Ob2,a1,a2,b1,b2
     $ !REAL ii,Nj,nR,nT

        PARAMETER(E1=210000000000.0,E2=200000000000.0,E3=200000000000.0,
     $        E4=120000000000.0,E5=12000000000.0,
     $        Js1=61.4,Js2=60,Js3=1,Js4=1,Js5=1,
     $        Jp1=80,Jp2=90,Jp3=1,Jp4=1,Jp5=1,
     $        Os1=235000000,Os2=306000000,Os3=353000000,
     $        Os4=1, Os5=1, 
     $    Ob1=372000,Ob2=471000,Ob3=1,Ob4=1,Ob5=1,
     $        a1=304000000,
     $        a2=460000000,a3=578000000,a4=332000000,a5=28700000,
     $        b1=1120000,b2=2570000,b3=3744000,b4=1454000,b5=190000
     $
     $        )
                 
        CHARACTER *8 ORIGIN
        !CHARACTER *1 N                   !杆件类型选择
         !所需计算的杆件数量,也用来循环
        PARAMETER  (Nj=5,nT=5,ii=5,nR=5)
        INTEGER S1,S2
        PARAMETER (S1=5,S2=5)!S1行表示不同杆件，S2列分别表示输入对象
         REAL SOLV(S1,S2)
         DIMENSION O(Nj)
         DIMENSION Ocr(nR)
              DIMENSION J(nT)
         INTEGER N1(ii)
     $!计算结果数组和表示应力的数组
                                                                !  S1为S2为列数
      INTEGER U1
        U1=3
        INTEGER n=1
         ORIGIN='PRE.DAT'
        OPEN(UNIT=U1,FILE=ORIGIN,STATUS='OLD',
     $        ACCESS='SEQUENTIAL',FORM='FORMATTED')
        READ(U1,100) N1(n),(SOLV(n,i),i=1,S2)  !杆件材料，边界，直径，长度，外力
        DO 10 WHILE(N1(n).NE.' '.AND.n.LT.S2)
                n=n+1
        READ(U1,100)N1(n),(SOLV(n,i),i=1,S2)
10    CONTINUE                                !在输入为空格或n大于给出数目时停止输入
          n=n-1
        DO 20 I=1,n
        !N=SOLVE(I,1),L=SOLVE(I,2),D=SOLVE(I,3),
     $ ! F=SOLVE(I,4),U=SOLVE(I,5)
     $ !上为输入参数格式        
        J(I)=4*SOLV(I,5)*SOLV(I,2)/SOLV(I,3)                           !拉姆达
        O(I)=4*SOLV(I,4)/(PI*SOLV(I,4)*SOLV(I,4))                        !应力
        SELECTCASE (N1(I))
         CASE(1)                                                          
                IF(J(I).GE.JS1) THEN
                        IF(J(I).GE.JP1) THEN
                        Ocr(I)=((PI*PI)*E1)/(J(I)*J(I))
                        ELSE
                        Ocr(I)=a1-b1*J(I)
                        ENDIF
                ELSE
                        Ocr(I)=Os1
                ENDIF
         CASE(2) 
                IF(J(I).GE.JS2) THEN
                        IF(J(I).GE.JP2) THEN
                        Ocr(I)=((PI*PI)*E2)/(J(I)*J(I))
                        ELSE
                        Ocr(I)=a2-b2*J(I)
                        ENDIF
                ELSE
                        Ocr(I)=Os2
                ENDIF
         CASE(3) 
                 IF(J(I).GE.JS3) THEN
                
                        IF(J(I).GE.JP3) THEN
                        Ocr(I)=((PI*PI)*E3)/(J(I)*J(I))
                        ELSE
                        Ocr(I)=a3-b3*J(I)
                        ENDIF
                ELSE
                        Ocr(I)=Os3
                   ENDIF
       CASE(4) 
                 IF(J(I).GE.JS4) THEN
                        IF(J(I).GE.JP4) THEN
                        Ocr(I)=((PI*PI)*E4)/(J(I)*J(I))
                        ELSE
                        Ocr(I)=a4-b4*J(I)
                        ENDIF
                ELSE
                          Ocr(I)=Os4
                ENDIF
        
       CASE(5) 
                 IF(J(I).GE.JS5) THEN
                        IF(J(I).GE.JP5) THEN
                        Ocr(I)=((PI*PI)*E5)/(J(I)*J(I))
                        ELSE
                        Ocr(I)=a5-b5*J(I)
                        ENDIF
                ELSE
                          Ocr(I)=Os5
                ENDIF
      ENDSELECT
20        CONTINUE
        OPEN(UNIT=2,FILE='AFT.DAT',STATUS='NEW',
     $        ACCESS='SEQUENTIAL',FORM='FORMATTED')
        WRITE(2,*)'计算结果如下所示：'
        DO 40 I=1,n
             IF(O(I).GE.Ocr(I)) THEN
                WRITE(2,200) 'σ=',O(I),'σcr=',Ocr(I),'σ>= σcr,故压杆失稳'
            ELSE
                WRITE(2,200) 'σ=',O(I),'σcr=',Ocr(I),'σ<= σcr,故压杆稳定'
            ENDIF

40    CONTINUE
            CLOSE(U1)
            CLOSE(2)
             WRITE(*,*)'计算完成，请自己查看输出结果文档。'
  100        FORMAT(1x,I1,5F6.2)
  200        FORMAT(1X,A,F6.2,A,F6.2,A)
             END