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Comparing contents of two Qfile(.txt)

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  • S Offline
    S Offline
    shree_121
    wrote on last edited by
    #1

    I have two files I get the text from two files in two variables as line and line1. I want compare two variables by if statement
    content of file:line=9 and line=31
    if (line > line1) {
    addto_logging ("line is greater than line1")
    }
    still line is less than line1, Qt output is line is greater than line1 that means it just comparing 9 and 3 not 9 and 31. what wrong here?

    jsulmJ 1 Reply Last reply
    0
    • S shree_121

      I have two files I get the text from two files in two variables as line and line1. I want compare two variables by if statement
      content of file:line=9 and line=31
      if (line > line1) {
      addto_logging ("line is greater than line1")
      }
      still line is less than line1, Qt output is line is greater than line1 that means it just comparing 9 and 3 not 9 and 31. what wrong here?

      jsulmJ Offline
      jsulmJ Offline
      jsulm
      Lifetime Qt Champion
      wrote on last edited by
      #2

      @shree_121 Wrong is here the way you're comparing. Strings are compared lexically (character by character, it does not interpret content): https://doc.qt.io/Qt-5/qstring.html#operator-gt

      https://forum.qt.io/topic/113070/qt-code-of-conduct

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      • S Offline
        S Offline
        shree_121
        wrote on last edited by
        #3

        @jsulm thank you, is there any way other way that i can convert content file in integer format sothat easy to compare big values.

        jsulmJ 1 Reply Last reply
        0
        • S shree_121

          @jsulm thank you, is there any way other way that i can convert content file in integer format sothat easy to compare big values.

          jsulmJ Offline
          jsulmJ Offline
          jsulm
          Lifetime Qt Champion
          wrote on last edited by
          #4

          @shree_121 Sure, but you will need to parse the strings by yourself to locate the numbers, then you can convert them using https://doc.qt.io/Qt-5/qstring.html#toInt

          https://forum.qt.io/topic/113070/qt-code-of-conduct

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          • S Offline
            S Offline
            shree_121
            wrote on last edited by
            #5

            @jsulm Thank you so much this exactly what i want.

            1 Reply Last reply
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