fprintf(file_out,"%lf",xyz[0]);什么意思

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fprintf(file_out,"%lf",xyz[0]);什么意思fprintf(file_out,"%lf",xyz[0]);什么意思fprintf(file_out,"%lf",xyz[0])

fprintf(file_out,"%lf",xyz[0]);什么意思
fprintf(file_out,"%lf",xyz[0]);什么意思

fprintf(file_out,"%lf",xyz[0]);什么意思
将xyz[0]的数值,以"%lf"双精度浮点数double的形式,写到文件file_out里面.