c - Compilation error: Statement with no effect

Question

dspList_t *pDspMng = NULL;

for(pDspMng = SDSPMNG; pDspMng->mesfct != NULL && strcmp (pDspMng->mesfct, mesfct); pDspMng->prec);

INTdspmng.sc: In function 'WebCallback':
INTdspmng.sc:216:9: error: statement with no effect [-Werror=unused-value]
         for(pDspMng = SDSPMNG; pDspMng->mesfct != NULL && strcmp (pDspMng->mesfct, mesfct); pDspMng->prec);

This loop is still waiting for a new mesfct for that i make ";" after for, i want an infinite loop

Answer 1

The pDspMng->prec is practically useless. You're computing the value but doing nothing with that value. You may want to store the value in some variable, maybe like pDspMng = pDspMng->prec

Also, the ; at the end of the for loop looks erroneous.