利用指针排序

int main(){

    int nNum1 = 0, nNum2 = 0, nNum3 = 0 ;
    int  *pNum1 = &nNum1,*pNum2 = &nNum2  , *pNum3 = &nNum3;
    printf( " 输入第一个数：\n");
    scanf_s(" %d ",pNum1);
    printf( " 输入第二个数：\n");
    scanf_s(" %d ",pNum2);
    printf( " 输入第三个数：\n");
    scanf_s(" %d ",pNum3) ;

    printf( "从小到大排序后：\n");
    if( *pNum1 > *pNum2){
        int *pTemp = pNum1;
    pNum1 = pNum2;
    pNum2 = pTemp;
}
 if( *pNum1 > *pNum3 ){
    int *pTemp = pNum1;
    pNum1 = pNum3;
    pNum3 = pTemp;
 }
 if( *pNum2 > *pNum3){
    int *pTemp = pNum2
    pNum2 = pNum3;
    pNum3 = pTemp;
 }

}