【C语言小练习】 任意输入N个数，输出其由大到小的数据。

【C语言小练习】 任意输入N个数，输出其由大到小的数据。

注意：使用了动态数组来存储数据。

 

#include <stdio.h>#include <stdlib.h>#include <conio.h>//插入函数void Insert( int newNum, int **arr, unsigned int *arrLengthIn );//排序函数void Sort_BigToSmall( int *arr, unsigned int arrLengthIn );//处理输入函数void InputDatas( int **arr, unsigned int *arrLengthIn );//输出函数void OutputDatas( int *arr, unsigned int arrLengthIn );int main( void ){//1.初始化数据int *arr = 0;unsigned int arrLength = 0;//2.输入数据InputDatas( &arr, &arrLength );//3.从大到小，排序Sort_BigToSmall( arr, arrLength );//4.输出数据OutputDatas( arr, arrLength );//Endprintf( "/r/n运行结束。按任意键退出。/r/n" );getch();return 0;}void Insert( int newNum, int **arr, unsigned int *arrLengthIn ){//使用动态数组(*arrLengthIn)++;if( (*arr) == 0 ){*arr = (int *)malloc( sizeof(int) );}else{*arr = (int *)realloc( (void *)(*arr), sizeof(int) * (*arrLengthIn) );}*((*arr) + (*arrLengthIn) - 1) = newNum;}void Sort_BigToSmall( int *arr, unsigned int arrLengthIn ){unsigned int i = 0;unsigned int j = 0;unsigned int length = arrLengthIn - 1;int *currentNum = 0;int *nextNum = 0;int t = 0;//冒泡排序for( i = 0; i < length; i++ ){for( j = 0; j < length; j++ ){currentNum = arr + j;nextNum = arr + j + 1;if( (*currentNum) < (*nextNum) ){t = (*currentNum);(*currentNum) = (*nextNum);(*nextNum) = t;}}}}void InputDatas( int **arr, unsigned int *arrLengthIn ){//1.初始化数据bool inputState = false;int inputCache = 0;//2.处理输入inputState = true;do {printf( "请输入第%u个数（输入0为结束输入）：", ((*arrLengthIn) + 1) );scanf( "%d", &inputCache );if( inputCache == 0 ){inputState = false;}else{Insert( inputCache, arr, arrLengthIn );}} while ( inputState );}void OutputDatas( int *arr, unsigned int arrLengthIn ){unsigned int i = 0;unsigned int length = arrLengthIn;printf( "/r/n数组的值：-----------------/r/n" );for( i = 0; i < length; i++ ){printf( "[%u] : %d/r/n", (i + 1), *(arr + i) );}printf( "/r/n" );}