# include <stdio.h>
# include <math.h>
void instruce(void);
double vel_sound(double temperature);/*velocity of sound*/
void instruce(void)
{
    printf("this program computes the velocity of sound\n");
        printf("to use this program,enter the temperature of the atmosphere ");
}
double main()
{
    double temperature;
    printf("please enter one number>\n");
    scanf("%lf",&temperature);
    printf("The velocity of sound is %f",vel_sound(temperature));
        return(0);
}
double vel_sound(double T)
{
    return(1086*sqrt((15*297)/247));
}
运行的时候为什么上面的那段显示不了。。。。

同志们。。。知道不要不说啊。。
万分感谢~

哭~~一样的额
 

额。。。明白了。。谢谢~。