输入电阻值，计算出并联电阻、串联电阻

#include <stdio.h> #include <stdlib.h> int main() {     double z=9.0/5.0;     double r1;     double r2;     printf("请输入两个电阻值:");     scanf("%lf,%lf",&r1,&r2);   printf("并联电阻为:%.2lf\n  串联电阻为:%.2lf\n",(

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