单项选择题
A. scanf("%d",&(*p).age); B. scanf("%s",&std.name); C. scanf("%c",&std[0],sex) D. scanf("%c",&(p->sex));
A. m=123n=456p=789 B. m=123 n=456 p=789 C. m=123,n=456,p=789 D. 123 456 789
A. double myadd(double a,b) ; B. double myadd(double,double); C. double myadd(double b,double a) ; D. double myadd(double x,double y);