此代码揭密了为何当国际油价在80与83.2之间徘徊时，中国油价却可以从6元一升涨到7.5一升
- // 定义油价变更阀值，当国际油价在此阀值之内，不作油价调整
- #define THRESHOLD 4.0
- // 当前中国油价
- #define CHINA 6.0
- // 当前国际油价
- #define INTER 80.0
- float china = 6.0;
- float inter = 80.0;
- void Adjust(float curInter)
- {
- float change = (float)(curInter - inter) / (float)inter;
- float absChange = change<0.0 ? -change:change;
- if( absChange*100.0 > THRESHOLD-Accuracy ){
- china = china + change*china;
- printf("当前国际油价%s幅为: %.2f%% 满足调价条件\n", change>0? "涨":"跌" ,absChange*100.0);
- }else{
- printf("当前国际油价%s幅为: %.2f%% 不满足调价条件\n", change>0? "涨":"跌", absChange*100.0);
- }
- inter = curInter;
- }
- int main(int argc, char* argv[])
- {
- float curInter = 0.0;
- while(1){
- printf("当前国际油价 %.2f，当前中国油价 %.2f\n",inter,china);
- printf("请输入当前国际油价: ");
- scanf("%f",&curInter);
- Adjust(curInter);
- if(curInter < 1.0)break;
- }
- return 0;
- }
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