Question

c++语法错误 syntax error : missing ';' before '&&'

if((n-1024)>0)
{ for(i=0;i<=2047;i++)
for(j=0;j<=m-2;j++)
{k = i + j * 2048 + n - 1024;
if((4.2 * avtotle[i] + totle[i]) > Data[k])&&((totle[i]-(4.2 * avtotle[i] )<Data[k]))
{retotle[i]=retotle[i]+Data[k];
renum++;
}
}
retotle[i]=retotle[i]/renum
}
else
{ for(i=0;i<=2047;i++)
for(j=0;j<=m-2;j++)
{k = i + j * 2048 + n + 1024;
if((4.2 * avtotle[i] + totle[i]) > Data[k])&&((totle[i]-(4.2 * avtotle[i] )<Data[k]))
{retotle[i]=retotle[i]+Data[k];
renum++;
}
}
retotle[i]=retotle[i]/renum
}

Answer 1

if((n-1024)>0)
{ for(i=0;i<=2047;i++)
for(j=0;j<=m-2;j++)
{k = i + j * 2048 + n - 1024;
if(((4.2 * avtotle[i] + totle[i]) > Data[k])&&((totle[i]-(4.2 * avtotle[i] )<Data[k])))//少)
{retotle[i]=retotle[i]+Data[k];
renum++;
}
}
retotle[i]=retotle[i]/renum //少；
}
else
{ for(i=0;i<=2047;i++)
for(j=0;j<=m-2;j++)
{k = i + j * 2048 + n + 1024;
if(((4.2 * avtotle[i] + totle[i]) > Data[k])&&((totle[i]-(4.2 * avtotle[i] )<Data[k])))//少（
{retotle[i]=retotle[i]+Data[k];
renum++;
}
}
retotle[i]=retotle[i]/renum; //少；
}

Answer 2

if((4.2 * avtotle[i] + totle[i]) > Data[k])&&((totle[i]-(4.2 * avtotle[i] )<Data[k]))
修改为
if( ((4.2 * avtotle[i] + totle[i]) > Data[k])&&((totle[i]-(4.2 * avtotle[i] )<Data[k])) )
if的括号缺少了

追问

#define m 200
double avtotle[2048];
avtotle[i]=avtotle[i]^(0.5);
illegal, right operand has type 'const double'
请问，这是怎么回事

Answer 3

少了一个挂号！