[Error] ISO C++ forbids comparison between pointer and integer [-fpermiss
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错误代码：
if(a[i]=="G"&&b[i]!="C")
return false;
改正后的代码：
if(a[i]=='G'&&b[i]!='C')
return false;
解释：两种不同类型的数据不能做比较，a[i]表示的是一个字符，“C”表示的是一个字符串的收地址，所以应该把“C”改为‘C’
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