程序

1.

#include<stdio.h>

#define GALLON 3.785
#define MILE 1.609
int main(void)
{
    float mile,gallon;
    printf("Please input miles and gallons:");
    scanf("%f%f",&mile,&gallon);
    printf("Mile per gallon:%.1f\n",mile/gallon);
    printf("Litres per 100 kilometre:%.1f\n",
    gallon*GALLON/(100*mile*MILE));
    return 0;

}

2.

#include<stdio.h>
int main(void)
{
    float height;
    char name[20];


    printf("Please input your height by inches:\n");
    scanf("%f",&height);
    printf("Please input your name:\n");
    scanf("%s",name);
    printf("%s,you are %f feet tall.\n",name,height);
    return 0;
}