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POMy search function in C++ is pulling up all the answers and not a single one
 

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  1. POMy search function in C++ is pulling up all the answers and not a single one
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    <p>I'm really confused. I have to make this lab for a class and I can't seem to have the search only display one result but all of the months of the year. I also can't seem to figure out why its not displaying the TotalRainfall when I input 0 into the month of the year. Thank you.</p> <pre><code>#include &lt;iostream&gt; #include &lt;fstream&gt; const int MaxSize = 12; //How many weather lines will be available. using namespace std; struct WeatherInformation { int Month; //Months of the year float TotalMonthsRainfall; //Total amount of rainfall float HighTemp; //The Highest temperature of the month. float LowTemp; //The Lowest temperature of the month. float AverageTemp; //The Average temperature of the month. }; WeatherInformation WeatherArray[MaxSize]; //Declaring a month array of MaxSize void ReadFile(ifstream&amp; MyinFile, WeatherInformation WeatherArray[]); void WeatherMonthSearch (WeatherInformation WeatherArray[]); int main() { float TotalRainfall = 0; int count = 1; //Counts how many times the for loop goes. int MonthOfWeather; //User input of the month. char ProgramRedo; //User input if they want to reuse the program. char exit_char; //User input to exit the program. ifstream MyinFile; //Variable that uses file. ReadFile (MyinFile, WeatherArray); //Call ReadFile Function WeatherMonthSearch (WeatherArray); //Call WeatherMonthSearch Function MyinFile.close(); //Closes file. } //Brett Holmes //4/30/2013 //PreCondition:You need a file labeled weather.dat //PostCondition: It puts the file variables into an array. void ReadFile(ifstream&amp; MyinFile, WeatherInformation WeatherArray[]) { float TotalRainfall = 0; char exit_char; int count = 0; int Month = 0; cout &lt;&lt; "Your Weather Machine" &lt;&lt; endl &lt;&lt; endl; MyinFile.open("weather.dat"); if (!MyinFile) { //no cout &lt;&lt; "Can't open input file." &lt;&lt; endl; //Tests the right file. char exit_char; //End Program cout &lt;&lt; "Press any key to exit" &lt;&lt; endl; cin &gt;&gt; exit_char; } for(count = 1; count &lt; MaxSize; count++) //Puts the file variables in the array. { WeatherArray[count].Month = WeatherArray[count].Month + 1; MyinFile &gt;&gt; WeatherArray[count].TotalMonthsRainfall; MyinFile &gt;&gt; WeatherArray[count].HighTemp; MyinFile &gt;&gt; WeatherArray[count].LowTemp; (WeatherArray[count].AverageTemp = ((WeatherArray[count].HighTemp + WeatherArray[count].LowTemp)/2)); (TotalRainfall = TotalRainfall + WeatherArray[count].TotalMonthsRainfall); } } //Brett Holmes //4/30/13 //PreCondition:You need to have the months already put into an array in a struct. //PostCondition:Outputs the rainfall stats the user puts in then asks to run again. //Outputs a error message if they type in the month wrong. void WeatherMonthSearch (WeatherInformation WeatherArray[]) { float TotalRainfall; int months; int MonthOfWeather; char ProgramRedo; do { bool MonthFound = false; cout &lt;&lt; "Please input the number of the Month. Ex. 1=Jan. 2=Feb. etc \n\n"; cin &gt;&gt; MonthOfWeather; for(int i = 1; i &lt;= MaxSize; i++) { months = WeatherArray[i].Month; if(months == MonthOfWeather ) //Finds the artist and outputs the results { cout &lt;&lt; "\nTotal Months Rainfall: " &lt;&lt; WeatherArray[i].TotalMonthsRainfall &lt;&lt; " \n"; cout &lt;&lt; "Highest Temperature: " &lt;&lt; WeatherArray[i].HighTemp &lt;&lt; " \n"; cout &lt;&lt; "Lowest Temperature: " &lt;&lt; WeatherArray[i].LowTemp &lt;&lt; " \n"; cout &lt;&lt; "Average Temperature: " &lt;&lt; WeatherArray[i].AverageTemp &lt;&lt; " \n"; MonthOfWeather = true; } } if(MonthOfWeather == 0) { cout &lt;&lt; "The total rainfall for the year is: " &lt;&lt; TotalRainfall &lt;&lt; "."; } if(MonthFound == false) { cout &lt;&lt; "\nMonth Number error. Month not found. Try again.\n\n"; MonthOfWeather = false; } cout &lt;&lt; "Would you like to look up another month of weather?\n"; cout &lt;&lt; "Enter a 'Y' if yes and 'N' if no.\n"; cin &gt;&gt; ProgramRedo; }while(ProgramRedo == 'Y'); } </code></pre>
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    1. USus2012
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    1. COYou know you're not populating the first entry in your array, right? And `WeatherMonthSearch` is accessing one-element beyond the array size, into the land of undefined behavior.
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      1. USWhozCraig
    2. CO@WhozCraig: Also NOT using the first element of the array... But MaxSize needs to be 13 to cover an array that uses 1..12.
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      1. USMats Petersson
    3. CO... also, `MonthOfWeather = true;` does not make sense...
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      1. USus2012
 

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