//定义一个标识符位max的函数
#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>
#include<stdlib.h>
int MAX(int a, int b){
if (a > b){
return a;
}
else
return b;
}
int main(){
int a,b;
printf("请输入两个数比较");
scanf("%d%d", &a,&b);
int max = MAX(a, b);
printf("%d\n", max);
system("pause");
return 0;
}
#include<stdio.h>
#include<stdlib.h>
int main(){
int num;
int score[10] = { 98, 45, 65, 76, 78, 96, 93, 81, 94, 92 };
num=Averaging(score);
printf("%d\n", num);
system("pause");
return 0;
}
int Averaging(int score[10]){
int num=0;
for (int i = 0; i < 10; i++){
num = num+score[i];
}
/*#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>
#include<time.h>
#include<stdlib.h>
//输出系统日期和时间
int main(){
int command[4] = { 0, 1, 2, 3 };
int num;
struct tm *systime;
printf("需要帮助请输入0\n");
printf("请输入你的指令\n");
while (1){
scanf("%d", &num);
if (command[0] == num){
printf("输入数字1显示系统日期，输入数字2显示系统时间，输入数字3退出系统\n");
}
else if (command[1] == num){
time_t nowtime;
time(&nowtime);
systime = localtime(&nowtime);
printf("系统日期:%d-%d-%d\n", 1900 + systime->tm_year, systime->tm_mon, systime->tm_mday);
}
else if (command[2] = num){
time_t nowtime;
time(&nowtime);
systime = localtime(&nowtime);
printf("%d:%d:%d\n", systime->tm_hour, systime->tm_min, systime->tm_sec);
}
else if (command[3] == num){
return 0;
}
printf("请输入命令符：\n");
}
system("pause");
return 0;
}*/
#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>
#include<stdlib.h>
int main(){//输出成绩按大小排列
int arr[12];
int i,j;
int tmp;
printf("请输入成绩\n");
for (i = 0; i < 12; i++){
printf("arr[%d]=",i);
scanf("%d", &arr[i]);
}
for (i = 0; i < 11; i++){
for (j = i + 1; j < 12; j++){
if (arr[i] < arr[j]){
tmp = arr[i];
arr[i] = arr[j];
arr[j] = tmp;
}
}
}
for (i = 0; i < 12; i++){
printf("%d\t", arr[i]);
if (i == 3 || i == 7){
printf("\n");
}
}
system("pause");
return 0;
}
#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>
#include<stdlib.h>
int main(){
char a[10];
char b[10];
int i=0;
printf("请输入字符串a：\n");
gets(a);
while (a[i] != ‘\0‘){
b[i] = a[i];
i++;
}
b[i] = ‘\0‘;
printf("打印字符串b\n");
puts(b);
system("pause");
}
#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>
main()
{
char s1[30], s2[30];
int i = 0;
printf("请输入字符串1:\n");
gets(s1);
while (s1[i] != ‘\0‘)
{
s2[i] = s1[i];
i++;
}
s2[i] = ‘\0‘;
printf("字符串2:\n");
puts(s2);
system("pause");
}
练习24
原文：https://www.cnblogs.com/yuzhenghan/p/12025382.html
