求助！老师出的一道简单题C

[binny0532]

编写函数fun4，根据运算符，计算两个实型（非零值）的和、差、积、商，要求在主函数中读入运算数和运算符

老师出的一道简单题，大家帮忙啊

[goodmrning]

赶快转到非技术区吧
不然版主……………………………………………………………………

[shaoze5]

float a,b,r;
char sign;
scanf("%f",&a);
scanf("%f",&b);
scanf("%c",&sign);
switch (sign){
case '+': r = a + b;break;
case '-': r = a - b;break;
case '*': r = a * b;break;
case '/': r = a / b;break;
}
printf("%f",r);

[binny0532]

呵呵 真快 谢谢

[shaoze5]

float fun4(float,float,char);

void main(){
    float   a,b,r; 
    char   sign; 
    scanf("%f",&a); 
    scanf("%f",&b); 
    scanf("%c",&sign); 
    r = fun4(a,b,sign);
    printf("%f",r);
}
float fun4(float a,float b,char sign)
    float r;
	switch   (sign){ 
	  case   '+':   r   =   a   +   b;break; 
	  case   '-':   r   =   a   -   b;break; 
	  case   '*':   r   =   a   *   b;break; 
	  case   '/':   r   =   a   /   b;break; 
	} 
    return r;
}