#include <stdio.h>
int main(void)
{
int age;
printf("How old are you?\n");
scanf("%d", &age); //Format speciflies type 'int *'but the arguement has type 'int'
printf("age = %d\n", age);
printf("%d is %f second.\n", age, age* 3.15e7);
return 0;
}
红色部分应该放在上面,不然age是垃圾值