练习2-1
#include<stdio.h> int main(void) { int x; int y; puts("请输入两个整数。"); printf("整数x:"); scanf("%d",&x); printf("整数y:"); scanf("%d",&y); printf("x是y的%d%%。\n",100*x/y); return 0; }
练习2-2
#include<stdio.h> int main(void) { int a; int b; puts("请输入两个整数。"); printf("整数a:"); scanf("%d",&a); printf("整数b:"); scanf("%d",&b); printf("它们的和是%d,积是%d\n",a+b,a*b); return 0; }
练习2-3
#include<stdio.h> int main(void) { double a; printf("请输入一个实数:"); scanf("%lf",&a); printf("你输入的是%lf\n",a); return 0; }
练习2-4 略
练习2-5
#include<stdio.h> int main(void) { int a; int b; printf("请输入两个整数。\n"); printf("整数a:"); scanf("%d",&a); printf("整数b:"); scanf("%d",&b); printf("a是b的%f%%\n",(double)(a)*100/((double)(b))); return 0; }
练习2-6
#include<stdio.h> int main(void) { int height; printf("请输入您的身高:"); scanf("%d",&height); printf("您的标准体重是%.1f公斤。\n",(height-100)*0.9); return 0; }