#include #include #include void main() { double a,b,c; do { scanf("%lf,%lf",&a,&b); getchar(); // 将残留的'\n'读出 c = sqrt(a*a + b*b); printf("%lf\n",c); printf("\ny:继续计算，n:退出\n"); }while (toupper(getchar()) == 'Y');}
