Member Avatar for plcross44

abc. txt has the following tab delimited values

100 81.7 2000

float tempFloat1;
float tempFloat2;
float tempFloat3;
float tempFloat4;
float tempFloat5;

ifstream inFile ("abc.txt", ios::in);
inFile >> tempFloat1; // debugger - 100
inFile >> tempFloat2; // debugger - 81.699995 WTF1???
inFile >> tempFloat3; // debugger - 100
//old school work around
tempFloat4 = floor(10.*tempFloat2); // debugger shows - 817
tempFloat5 = tempFloat4/10.);// debugger - 81.699995 WTF2???

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  • Latest Post Latest Post by Ancient Dragon
Member Avatar for Ancient Dragon

many floating point values can not be represented exactly in memory due to the way they are stored. For a complete explanation read this wiki article which will probably tell you a lot more than you dared to know.

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