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                Program to compute compound interest. 
                 
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                IDENTIFICATION DIVISION. 
                PROGRAM-ID. Q6. 
                ENVIRONMENT DIVISION. 
                CONFIGURATION SECTION. 
                SOURCE-COMPUTER. IBM PC. 
                OBJECT-COMPUTER. IBM PC. 
                INPUT-OUTPUT SECTION. 
                SELECT IN-FILE ASSIGN TO "Q6IN.DAT" ORGANIZATION IS 
                LINE SEQUENTIAL. 
                SELECT OUT-FILE ASSIGN TO "Q6OUT.TXT". 
                 
                DATA DIVISION. 
                FILE SECTION. 
                FD IN-FILE. 
                01 IN-REC. 
                02 IN-PRINCIPAL PIC 9(5)V99. 
                02 IN-ROI PIC 99. 
                02 IN-TIME PIC 99. 
                FD OUT-FILE. 
                01 OUT-REC PIC X(80).  
                 
                 
                WORKING-STORAGE SECTION. 
                77 COMPOUND-INTEREST PIC 9(4)V99. 
                77 EOF PIC X VALUE "N". 
                77 HEADING1 PIC X(80) VALUE ALL "-". 
                01 OUT-FORMAT. 
                02 OUT-PRINCIPAL PIC 9(5)V99. 
                02 F PIC X(5) VALUE SPACES. 
                02 OUT-ROI PIC 99. 
                02 F PIC X(5) VALUE SPACES. 
                02 OUT-TIME PIC 99. 
                02 F PIC X(10) VALUE SPACES. 
                02 OUT-COMPOUND-INTEREST PIC 9999.99. 
                 
                PROCEDURE DIVISION. 
                MAIN-PARA. 
                OPEN INPUT IN-FILE OUTPUT OUT-FILE. 
                MOVE HEADING1 TO OUT-REC. 
                WRITE OUT-REC BEFORE ADVANCING 1 LINE. 
                MOVE " COMPOUND INTEREST CALCULATION" 
                TO OUT-REC. 
                WRITE OUT-REC BEFORE ADVANCING 1 LINE . 
                MOVE HEADING1 TO OUT-REC.  
                WRITE OUT-REC BEFORE ADVANCING 1 LINE. 
                MOVE "AMT (RS.) RATE TIME (YR.) COMP. INTEREST (RS.) " to OUT-REC. 
                WRITE OUT-REC BEFORE ADVANCING 1 LINE. 
                 
                READ IN-FILE AT END MOVE "Y" TO EOF. 
                PERFORM CALC-PARA UNTIL EOF = "Y". 
                DISPLAY "THE DETAILS HAVE BEEN WRITTEN TO FILE Q6OUT.DAT". 
                CLOSE IN-FILE , OUT-FILE. 
                STOP RUN. 
                 
                CALC-PARA. 
                COMPUTE COMPOUND-INTEREST 
                = IN-PRINCIPAL * ( 1 + IN-ROI / 100 ) ** IN-TIME 
                MOVE IN-PRINCIPAL TO OUT-PRINCIPAL. 
                MOVE IN-ROI TO OUT-ROI. 
                MOVE IN-TIME TO OUT-TIME. 
                MOVE COMPOUND-INTEREST TO OUT-COMPOUND-INTEREST. 
                MOVE OUT-FORMAT TO OUT-REC. 
                WRITE OUT-REC BEFORE ADVANCING 1 LINE. 
                 
                READ IN-FILE AT END MOVE "Y" TO EOF. 
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