Q1:是在开始中运行"cmd"进入 command prompt ?
对
Q2:Rtools装在"G:\Program Files\Rtools\"..
主要是检测路径是否设置正确
请先执行
c:\>gcc --help
若成功,你可看到a list of options.
有问题请告知
Q3:
用NOTEPAD把下列这段存成matprod1.c
/* File: matprod1.c */
/* Calculates the product of two matrices X and Y */
void matprod1(double *X, int *nrX, int *ncX,
double *Y, int *nrY, int *ncY, double *ans)
{
double sum;
int ii, jj, kk;
for (ii=0; ii<*nrX; ii++){
for (jj=0; jj<*ncY; jj++){
sum = 0;
for (kk=0; kk<*ncX; kk++){
sum = sum + X[ii+*nrX*kk]*Y[kk+*nrY*jj];
}
ans[ii+*nrX*jj] = sum;
}
}
}
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