[rrd-users] how to use rrd_fetch and rrd_update_v in C API

[spartawhy117]

i have read those doc,but i found those almost tell how to use commands in
terminal to control rrd database.As for c api, there is little example about
C api use thoese function which return a struct .my situation is if i want
to check the value of .rrd file ,i can only to graph it to know it is right
or error. or use rrdtool.exe to check the file. But i want to check the
value in the program code.so how to handle the return value of  rrd_fetch()
function is important to me.thanks for your help



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