50 lines
1 KiB
C++
50 lines
1 KiB
C++
#include<iostream>
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long double stringToFloat(const std::string& strng, bool decimalPoint)
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{
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/*Alternative mit stold welche in der Deklaration der Nebenfunktion zusätzlich einen Boolean "Komma" benötigt,
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welcher angibt ob es mt oder ohne Kommas arbeiten soll
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long double number;
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bool minus = false;
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std::string::size_type idx;
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std::string FNum = "";
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for(char c:str)
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{
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if(c>='0' && c<='9') FNum += c;
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else if(c == '-') minus = true;
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else if((c=='.' || c==',') && decimalPoint) decimalPoint = false, FNum += c;
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}
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number = std::stold(FNum, &idx);
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if(minus) Zahl*=-1;
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return(number);*/
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bool DP = false;
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long double number;
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unsigned short place = 0;
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for(char c : strng)
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{
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if(c>='0' && c<='9')
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{
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c = c-'0';
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if(!DP) number = number*10+c;
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else
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{
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long double number2 = c;
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for(unsigned short loop = 0; loop<=place; loop++) number2 /= 10;
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number += number2, place++;
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}
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}
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else if((c=='.' || c==',') && decimalPoint) DP=true;
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}
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return(number);
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}
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