warning: deprecated conversion from string constant to "char *"
2012-12-14 10:37
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今天碰到了这个警告,老老实实的google了一下,以下是收获:
问题是这样产生的,先看这个函数原型:
void someFunc(char *someStr);
再看这个函数调用:
someFunc("I'm a string!");
把这两个东西组合起来,用最新的g++编译一下就会得到标题中的警告。
为什么呢?原来char *背后的含义是:给我个字符串,我要修改它。
而理论上,我们传给函数的字面常量是没法被修改的。
所以说,比较和理的办法是把参数类型修改为const char *。
这个类型说背后的含义是:给我个字符串,我只要读取它。
问题是这样产生的,先看这个函数原型:
void someFunc(char *someStr);
再看这个函数调用:
someFunc("I'm a string!");
把这两个东西组合起来,用最新的g++编译一下就会得到标题中的警告。
为什么呢?原来char *背后的含义是:给我个字符串,我要修改它。
而理论上,我们传给函数的字面常量是没法被修改的。
所以说,比较和理的办法是把参数类型修改为const char *。
这个类型说背后的含义是:给我个字符串,我只要读取它。
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