使用gets_s()函数读取输入并使用atoi()将其转换为整数值

#include <stdio.h>
#include <stdlib.h>
int getval(void);
int main()
{
   int age,weight,area;
   float iq;
   printf("Program to calculate your IQ./n");
   printf("Enter your age:");
   age=getval();
   printf("Enter your weight:");
   weight=getval();
   printf("Enter the your area code:");
   area=getval();
   iq=(age*weight)/area;
   printf("This computer estimates your IQ to be %f./n",iq);
   return(0);
}
int getval(void)
{
   char input[20];
   int x;
   gets_s(input);
   x=atoi(input);
   return(x);
}