各种函数练习－基础day05作业 - 黑马程序员技术交流社区

//
// main.c
// HomeWork_01
//
// Created by 蒋伟 on 16/5/12.
// Copyright (c) 2016年蒋伟. All rights reserved.
//
#include <stdio.h>
int quDeMax(int num1,int num2);
int siSheWuRu(float num);
void panDuanChengNian(int age);
void panDuanRunNian(int year);
int quTianShu(int year,int mouth);
void panDuan5WeiShu(int num);
int quLeiJiaHe(int min,int max);
void panDuan3BeiShu(int num);
void panDuanZhengShu(float num);
char fenDengJi(int score);
int quJiShuLeiJiaHe(int min,int max);
int main(int argc, const char * argv[]) {
printf("请输入两个数以比较大小：");
int num1,num2;
scanf("%d%d",&num1,&num2);
int max1 = quDeMax(num1,num2);
printf("两者之间较大的是：%d\n\n",max1);
printf("请输入一个浮点数进行四舍五入：");
float num3;
scanf("%f",&num3);
int result = siSheWuRu(num3);
printf("%.2f四舍五入的结果为：%d\n\n",num3,result);
printf("请输入您的年龄以判断您是否成年：");
int age;
scanf("%d",&age);
panDuanChengNian(age);
printf("\n");
printf("请输入一个年份以判断是否是闰年：");
int year;
scanf("%d",&year);
panDuanRunNian(year);
printf("\n");
printf("请输入年份和月份查询此月的天数：");
int year2,mouth2;
scanf("%d%d",&year2,&mouth2);
int day = quTianShu(year2,mouth2);
printf("%d年%d月有%d天！\n\n",year2,mouth2,day);
printf("请输入一个5位数以判断各位数加起来是不是5:");
int num4;
scanf("%d",&num4);
panDuan5WeiShu(num4);
printf("\n");
printf("请输入范围以求累加和：");
int min2,max2;
scanf("%d%d",&min2,&max2);
int sum2 = quLeiJiaHe(min2,max2);
printf("累加的和为：%d\n\n",sum2);
printf("请输入一个整数判断是否是3的倍数：");
int num5;
scanf("%d",&num5);
panDuan3BeiShu(num5);
printf("\n");
printf("请输入一个数判断是否是正数：");
float num6;
scanf("%f",&num6);
panDuanZhengShu(num6);
printf("\n");
printf("请输入您的成绩：");
int score;
scanf("%d",&score);
char result2 = fenDengJi(score);
printf("您获得的等级是：%c\n\n",result2);
printf("请输入范围以求奇数累加和：");
int min3,max3;
scanf("%d%d",&min3,&max3);
int sum3 = quJiShuLeiJiaHe(min3,max3);
printf("奇数累加的和为：%d\n\n",sum3);
return 0;
}
/**
*取两个整数的最大值
*/
int quDeMax(int num1,int num2){
if(num1>=num2){
return num1;
}else{
return num2;
}
}
/**
*返回浮点数四舍五入的整数
*/
int siSheWuRu(float num){
int zheng = (int)num;
float fen = num - zheng;
if(fen >= 0.5){
zheng++;
}
return zheng;
}
/**
*判断是否成年
*/
void panDuanChengNian(int age){
if(age>=18){
printf("您已成年！\n");
}else{
printf("您未成年！\n");
}
}
/**
*判断年份是否为闰年
*/
void panDuanRunNian(int year){
if(year%400==0 ||(year%100!=0&&year%4==0)){
printf("%d年是闰年！\n",year);
}else{
printf("%d年不是闰年！\n",year);
}
}
/**
*返回该年月的天数
*/
int quTianShu(int year,int mouth){
switch(mouth){
case 1: case 3: case 5: case 7: case 8: case 10: case 12:
return 31;
break;
case 4: case 6: case 9: case 11:
return 30;
break;
case 2:
if(year%400==0||(year%100!=0&&year%4==0)){
return 29;
}else{
return 28;
}
default:
return 0;
}
}
/**
*判断5位数的五位加起来等不等于5
*/
void panDuan5WeiShu(int num){
int g = num%10;
int s = num/10%10;
int b = num/100%10;
int q = num/1000%10;
int w = num/10000;
if(g+s+b+q+w == 5){
printf("%d五位数的各位数和为五。\n",num);
}else{
printf("%d五位数的各位数和不为五。\n",num);
}
}
/**
*返回min－max范围内整数的累加和
*/
int quLeiJiaHe(int min,int max){
int sum = 0;
for(int i = min; i <= max; i++){
sum+=i;
}
return sum;
}
/**
*判断整数是不是3的倍数
*/
void panDuan3BeiShu(int num){
if(num%3 == 0){
printf("%d是3的倍数\n",num);
}else{
printf("%d不是3的倍数\n",num);
}
}
/**
*判断一个数是不是正数
*/
void panDuanZhengShu(float num){
if(num > 0){
printf("%.2f是正数！\n",num);
}else{
printf("%.2f不是正数！\n",num);
}
}
/**
*返回分数所在等级
*/
char fenDengJi(int score){
if(score >= 90){
return 'A';
}else if(score >= 80){
return 'B';
}else if(score >= 70){
return 'C';
}else if(score >= 60){
return 'D';
}else{
return 'E';
}
}
/**
*返回min－max的奇数和
*/
int quJiShuLeiJiaHe(int min,int max){
int sum;
for(int i = min; i <= max; i++){
if(i%2 == 1){
sum+=i;
}
}
return sum;
}

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