[提问]QString::arg的问题 [复制链接]

写了这么一句：
QString r=QString("%1").arg(int(12),5,10,'a');

既然提示这样的错误！ 这要怎么解决？
error C2666: “QString::arg”: 9 个重载有相似的转换
1>        D:\QtSDK\Desktop\Qt\4.7.3\msvc2008\include\QtCore/qstring.h(161): 可能是“QString QString::arg(double,int,char,int,const QChar &) const”
1>        D:\QtSDK\Desktop\Qt\4.7.3\msvc2008\include\QtCore/qstring.h(159): 或       “QString QString::arg(ushort,int,int,const QChar &) const”
1>        D:\QtSDK\Desktop\Qt\4.7.3\msvc2008\include\QtCore/qstring.h(157): 或       “QString QString::arg(short,int,int,const QChar &) const”
1>        D:\QtSDK\Desktop\Qt\4.7.3\msvc2008\include\QtCore/qstring.h(155): 或       “QString QString::arg(uint,int,int,const QChar &) const”
1>        D:\QtSDK\Desktop\Qt\4.7.3\msvc2008\include\QtCore/qstring.h(153): 或       “QString QString::arg(int,int,int,const QChar &) const”
1>        D:\QtSDK\Desktop\Qt\4.7.3\msvc2008\include\QtCore/qstring.h(151): 或       “QString QString::arg(ulong,int,int,const QChar &) const”
1>        D:\QtSDK\Desktop\Qt\4.7.3\msvc2008\include\QtCore/qstring.h(149): 或       “QString QString::arg(long,int,int,const QChar &) const”
1>        D:\QtSDK\Desktop\Qt\4.7.3\msvc2008\include\QtCore/qstring.h(147): 或       “QString QString::arg(qulonglong,int,int,const QChar &) const”
1>        D:\QtSDK\Desktop\Qt\4.7.3\msvc2008\include\QtCore/qstring.h(145): 或       “QString QString::arg(qlonglong,int,int,const QChar &) const”
1>        试图匹配参数列表“(int, int, int, char)”时

arg(int(12),5,10,'a')里面你放相同类型

这个是格式化字符串吧
不要用'a'，用QChar('a')，'a'会歧义，大概就是这个原因
那个int(12)不用也可以应该

一个arg（）里只能放一个参数，多个参数用多个arg（）
QString（“%1，%2，%3”）.arg(5).arg(1.23).arg("ABC);