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问执行外部功能后不工作的printf
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Stack Overflow用户

提问于 2014-01-03 07:07:16

回答 1查看 260关注 0票数 1

我有以下c#代码，它调用cobol程序：

#include <stdio.h>
#include "libcob.h"
//#pragma linkage (verkoop, COBOL)

extern void VERKOOP(char *productid, char *aantal, char*resultaat);

main(int argc, char *argv[])
{
    int return_status;
    COB_RTD = cob_get_rtd();
    char *productid = "20    ";
    char *aantal = "000020";
    char resultaat[30];
    cob_init(rtd, 0, NULL);
    printf("hallo");//prints
    VERKOOP(productid, aantal, resultaat);
    printf("hallo");//doesn't print
    printf("resultaat:%s", resultaat);// doesn't print
    cob_stop_run (rtd, return_status);
}

我正在使用printf来查看结果是否被正确分配。但是，由于某种原因，VERKOOP之后的两行都不会打印。

这是VERKOOP的COBOL代码(他确实在这里正确地填写了LS-RESULTAAT，我用DISPLAY进行了尝试，这部分工作)：

*************************************************************
* VERKOOP  
*************************************************************
       IDENTIFICATION DIVISION.
       PROGRAM-ID. VERKOOP.

       ENVIRONMENT DIVISION.
       INPUT-OUTPUT SECTION.
       FILE-CONTROL.
       SELECT PRODUCTEN ASSIGN TO "BESTANDEN/LIJSTPRODUCTEN"
           ACCESS MODE IS RANDOM
           ORGANIZATION IS INDEXED
           RECORD KEY IS PRODUCTID
           FILE STATUS IS WS-FILE-STATUS.

       DATA DIVISION.
       FILE SECTION.
       FD  PRODUCTEN BLOCK CONTAINS 10 RECORDS.
       01  PRODUCT.
           02 PRODUCTID PIC X(6).
           02 LEVERANCIERID PIC X(6).
           02 AANTAL PIC 9(6).
       WORKING-STORAGE SECTION.
       77  FOUT PIC X.
           88 PRODUCT-NIET-GEVONDEN VALUE 1.
       77 WS-PRODUCTID PIC X(6).
       77 WS-AANTAL PIC 9(6).
       77 WS-FILE-STATUS PIC XX.
       77 WS-RESULTAAT PIC X(30).
       LINKAGE SECTION.
       01 LS-PRODUCTID PIC X(6).
       01 LS-AANTAL PIC 9(6).
       01 LS-RESULTAAT PIC X(30).
       PROCEDURE DIVISION USING LS-PRODUCTID, LS-AANTAL, LS-RESULTAAT.

       MAIN.
           PERFORM INITIALISEER
           PERFORM LEES-PRODUCT-IN
           PERFORM LEES-BESTAND
           PERFORM SLUIT-BESTAND
           STOP RUN.

       INITIALISEER.
           OPEN I-O PRODUCTEN.
*          DISPLAY WS-FILE-STATUS..

       LEES-PRODUCT-IN.
           MOVE LS-PRODUCTID TO WS-PRODUCTID
           MOVE LS-AANTAL TO WS-AANTAL
           MOVE 'OK' TO WS-RESULTAAT
*          DISPLAY WS-RESULTAAT
           MOVE WS-RESULTAAT TO LS-RESULTAAT.       
*          DISPLAY "GEEF PRODUCTID OP: "
*          ACCEPT WS-PRODUCTID
*          DISPLAY "GEEF AANTAL OP: "
*          ACCEPT WS-AANTAL.

       LEES-BESTAND.
*      DISPLAY "LEES-BESTAND"
       MOVE WS-PRODUCTID TO PRODUCTID
*      DISPLAY PRODUCTID
*      DISPLAY WS-FILE-STATUS
       READ PRODUCTEN INVALID KEY SET PRODUCT-NIET-GEVONDEN TO TRUE
       END-READ 
       IF PRODUCT-NIET-GEVONDEN PERFORM FOUTJE    
       ELSE 
*      MOVE WS-PRODUCTID TO PRODUCTID
       SUBTRACT WS-AANTAL FROM AANTAL   
       PERFORM UPDATE-PRODUCT
       END-IF.


      UPDATE-PRODUCT.
        REWRITE PRODUCT INVALID KEY PERFORM FOUTJE.

        SLUIT-BESTAND.
*       DISPLAY "SLUIT-BESTAND"
           CLOSE PRODUCTEN.

        FOUTJE.
           DISPLAY "ER IS EEN FOUT OPGETREDEN"
           DISPLAY WS-FILE-STATUS
           STOP RUN.