线性差值算法

点斜式：

#include<stdio.h>#define N 10float w = 10.0;float w0 = 0.0;float wn = 100.0;int adc[N+1] = {86,376,687,1021,1379,1760,2164,2592,3043,3515,4008};float line(int x){     int i;     if(x<adc[0]) return(w0);     if(x>=adc[N]) return(wn);     for(i=0;i<N;i++) if(x<adc[i+1]) break;     return (w*i + (w*(x-adc[i])/(adc[i+1]-adc[i])));}main(){    int x;    float y;    while(1){        printf("\n输入A/D转换结果");        scanf("%d",&x);        if(x==0)  break;        y = line(x);        printf("\n对应温度为:%2.2f度",y);    }}