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  • R Razanust

    I have names of certain students and their ages stored in a text file 'records.txt'. LIKE: John 22 Paul 21 Sam 24 Harry 23 Now i want to store these ages and names in a structure 'records(r)' directly from the file. (Here i am not taking any input from the user) as r.name & r.age. Any clue to the solution???

    R Offline
    R Offline
    Razanust
    wrote on last edited by
    #3

    I couldn't get that. Plesae elaborate the clue so that i can learn a bit more. I am trying to use the "isdigit" command for this purpose. Would that be suitable?

    H 1 Reply Last reply
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    • R Razanust

      I couldn't get that. Plesae elaborate the clue so that i can learn a bit more. I am trying to use the "isdigit" command for this purpose. Would that be suitable?

      H Offline
      H Offline
      Harsh Shankar
      wrote on last edited by
      #4

      Dear Razanust, I'll first suggess you not to create a new thread if you aren't satisfied with the answer.

      Razanust wrote:

      couldn't get that. Plesae elaborate the clue so that i can learn a bit more. I am trying to use the "isdigit" command for this purpose. Would that be suitable?

      Now, as your file is a text file, :confused: First Clear whether you have stored it by formating by sprintf and then WriteFile etc or Writing the structure directly? HARSH Programmers are in a race with the Universe to create bigger and better idiot-proof programs, while the Universe is trying to create bigger and better idiots. So far the Universe is winning.

      modified on Tuesday, June 30, 2009 3:59 AM

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      • R Razanust

        I have names of certain students and their ages stored in a text file 'records.txt'. LIKE: John 22 Paul 21 Sam 24 Harry 23 Now i want to store these ages and names in a structure 'records(r)' directly from the file. (Here i am not taking any input from the user) as r.name & r.age. Any clue to the solution???

        M Offline
        M Offline
        Michael Schubert
        wrote on last edited by
        #5

        Razanust wrote:

        Any clue to the solution???

        1. Read the file line by line 2. use something like strtok to tokenize each line 3. fill the structure

        H 1 Reply Last reply
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        • R Razanust

          I have names of certain students and their ages stored in a text file 'records.txt'. LIKE: John 22 Paul 21 Sam 24 Harry 23 Now i want to store these ages and names in a structure 'records(r)' directly from the file. (Here i am not taking any input from the user) as r.name & r.age. Any clue to the solution???

          R Offline
          R Offline
          Rajesh R Subramanian
          wrote on last edited by
          #6

          You need to open the file, read the contents, parse the read contents, store them into an array of structures. Which part of this exercise are you having a problem with? And what have you done so far?

          It is a crappy thing, but it's life -^ Carlo Pallini

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          • M Michael Schubert

            Razanust wrote:

            Any clue to the solution???

            1. Read the file line by line 2. use something like strtok to tokenize each line 3. fill the structure

            H Offline
            H Offline
            Harsh Shankar
            wrote on last edited by
            #7

            I Don't know why u are trying there tipical methods. Just Try the "C" way: -

            struct MyStruct
            {
            	char Name\[20\];
            	int age;
            }
            // Fill the Structure with the appropriate values
            MyStruct myStruct;
            FILE \*pFile = fopen("Record.txt", "Wb+");
            fwrite((char\*)&myStruct, sizeof(MyStruct), 1, pFile);
            

            and to reead :-

            fread((char*)&myStruct, sizeof(MyStruct), 1, pFile);

            HARSH Programmers are in a race with the Universe to create bigger and better idiot-proof programs, while the Universe is trying to create bigger and better idiots. So far the Universe is winning.

            M 1 Reply Last reply
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            • H Harsh Shankar

              I Don't know why u are trying there tipical methods. Just Try the "C" way: -

              struct MyStruct
              {
              	char Name\[20\];
              	int age;
              }
              // Fill the Structure with the appropriate values
              MyStruct myStruct;
              FILE \*pFile = fopen("Record.txt", "Wb+");
              fwrite((char\*)&myStruct, sizeof(MyStruct), 1, pFile);
              

              and to reead :-

              fread((char*)&myStruct, sizeof(MyStruct), 1, pFile);

              HARSH Programmers are in a race with the Universe to create bigger and better idiot-proof programs, while the Universe is trying to create bigger and better idiots. So far the Universe is winning.

              M Offline
              M Offline
              Michael Schubert
              wrote on last edited by
              #8

              Harsh Shankar wrote:

              I Don't know why u are trying there tipical methods.

              What?

              H 1 Reply Last reply
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              • M Michael Schubert

                Harsh Shankar wrote:

                I Don't know why u are trying there tipical methods.

                What?

                H Offline
                H Offline
                Harsh Shankar
                wrote on last edited by
                #9

                Wouldn't it be easier to read and write the data in the file by my given way??

                HARSH Programmers are in a race with the Universe to create bigger and better idiot-proof programs, while the Universe is trying to create bigger and better idiots. So far the Universe is winning.

                modified on Tuesday, June 30, 2009 5:25 AM

                M 1 Reply Last reply
                0
                • R Razanust

                  I have names of certain students and their ages stored in a text file 'records.txt'. LIKE: John 22 Paul 21 Sam 24 Harry 23 Now i want to store these ages and names in a structure 'records(r)' directly from the file. (Here i am not taking any input from the user) as r.name & r.age. Any clue to the solution???

                  A Offline
                  A Offline
                  Aric Wang
                  wrote on last edited by
                  #10

                  supposing your use C language.may be this is a simply.You could use fscanf() function to realize it.You may find out the method of "fscanf()".

                  Like C++ more

                  1 Reply Last reply
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                  • H Harsh Shankar

                    Wouldn't it be easier to read and write the data in the file by my given way??

                    HARSH Programmers are in a race with the Universe to create bigger and better idiot-proof programs, while the Universe is trying to create bigger and better idiots. So far the Universe is winning.

                    modified on Tuesday, June 30, 2009 5:25 AM

                    M Offline
                    M Offline
                    Michael Schubert
                    wrote on last edited by
                    #11

                    I don't see anything in his post about writing the data back to a file. He only wants to read the file and store the tokens in a structure (or presumably an array of structures).

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                    • R Razanust

                      I have names of certain students and their ages stored in a text file 'records.txt'. LIKE: John 22 Paul 21 Sam 24 Harry 23 Now i want to store these ages and names in a structure 'records(r)' directly from the file. (Here i am not taking any input from the user) as r.name & r.age. Any clue to the solution???

                      D Offline
                      D Offline
                      David Crow
                      wrote on last edited by
                      #12

                      Razanust wrote:

                      Any clue to the solution???

                      Well, something like this comes to mind:

                      std::ifstream fin;
                      std::vector<Record> records;

                      fin.open("c:\\Records.txt");
                      std::copy(std::istream_iterator<Record>(fin), std::istream_iterator<Record>(), std::back_inserter(records));
                      fin.close();

                      Hint: you'll need to create the Record class. ;)

                      "Old age is like a bank account. You withdraw later in life what you have deposited along the way." - Unknown

                      "Fireproof doesn't mean the fire will never come. It means when the fire comes that you will be able to withstand it." - Michael Simmons

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