I would go to California in ________.[ ]

A. the USA

B. USA

C. the America

D. American

若各选项中所用变量已正确定义,函数fun中通过return语句返回—个函数值,以下选项中错误的程序是【 】。

A．main() {……X=fun(2,10)；……} float fun(int a,int b){……}

B．float fun(int a,int b){……} main(){……X=fun(i,j)；……}

C．float fun(int,int)；main() {……x=fun(2,10)；……} float fun(int a,int b){……}