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I want the following code to remove a leading zero from a price (0.00 should be cut to .00)
QString price1 = "0.00";
if( price1.at( 0 ) == "0" ) price1.remove( 0 );
This gives me the following error: "error: conversion from ‘const char [2]’ to ‘QChar’ is ambiguous"
929
Generally speaking: If you want to initialize a QString from a char*, use QStringLiteral . If you want to pass it to a method, check if that method has an overload for QLatin1String - if yes you can use that one, otherwise fall back to QStringLiteral .
QString() creates a string for which both isEmpty() and isNull() return true . A QString created using the literal "" is empty ( isEmpty() returns true ) but not null ( isNull() returns false ). Both have a size() / length() of 0.
To break up a string into a string list, we used the QString::split() function. The argument to split can be a single character, a string, or a QRegExp. To concatenate all the strings in a string list into a single string (with an optional separator), we used the join() function.
QString stores unicode strings. By definition, since QString stores unicode, a QString knows what characters it's contents represent. This is in contrast to a C-style string (char*) that has no knowledge of encoding by itself.
The main issue is that Qt is seeing "0" as a null-terminated ASCII string, hence the compiler message about const char[2].
Also, QString::remove() takes two arguments. So you code should be:
if( price1.at( 0 ) == '0' ) price1.remove( 0, 1 );
This builds and runs on my system (Qt 4.7.3, VS2005).
52
Try this:
price1.at( 0 ) == '0' ?
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