error C2297: '+' : illegal, right operand has type 'double...答:double loga(double n, double base);//无用声明 int main(void){ double a,x,y,m,n;printf("input a,x:");scanf("%lf,%lf",&a,&x);//你把l写出1了 对于double类型,要用lf,而不是f y=pow(a,5)+sin(a*x)+log(exp(a+x))+exp(a*x);//对于log(exp(a+x)),实际上...