第一题
#include<stdio.h>
#define Months 12
#define Years 5
int main(void)
{
const float rain[Years][Months] = {
{4.3,4.3,4.3,3.0,2.0,1.2,0.2,0.5,2.1,3.6,1.1,0.9},
{1.1,2.2,2.2,2.2,1.1,2.2,3.3,1.2,2.1,2.2,3.3,2.1},
{1.2,3.1,0.2,0.4,1.5,1.4,1.8,2.4,2.6,2.5,3.1,1.7},
{1.1,4.2,3.3,2.2,1.5,2.9,4.2,1.1,2.4,3.9,0.9,0.7},
{3.1,2.8,1.9,1.8,1.3,2.9,3.1,1.1,0.8,0.8,0.5,1.5}
};
printf("YEAR RAINFALL\n");
float SumRain = 0;
for(int Y = 0 ; Y < Years ; ++Y)
{
float RainOfYear = 0;
for(int M = 0 ; M < Months ; ++M)
RainOfYear += *(*(rain + Y) + M);
printf("M .1f\n",2000+Y,RainOfYear);
SumRain += RainOfYear;
}
printf("THe Yearly Average Is %.2F Inches.\n",SumRain/Years);
printf("Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec\n");
for(int M = 0 ; M < Months ; ++M)
{
float RainOfMonth = 0;
for(int Y = 0 ; Y < Years ; ++Y)
RainOfMonth += *(*(rain + Y) + M);
printf("%-4.1f",RainOfMonth/Months);
}
return 0;
}
第二题
#include<stdio.h>
#define LEN 5
void copy_ptr(const double* sourceArr , double* tarArr , int Len);
void copy_arr(const double sourceArr[] , double tarArr[] , int Len);
int main(void)
{
double source[LEN] = {1.1,2.2,3.3,4.4,5.6};
double target_1[LEN];
double target_2[LEN];
copy_ptr(source,target_1,LEN);
copy_ptr(source,target_2,LEN);
printf("Array_ptr");
for(int i = 0 ; i < LEN ; ++i)
printf("%-4.2lf ",*(target_1+i));
printf("\n");
printf("Array_arr");
for(int i = 0 ; i < LEN ; ++i)
printf("%-4.2lf ",target_2[i]);
printf("\n");
return 0;
}
void copy_ptr(const double* sourceArr , double* tarArr , int Len)
{
for(int i = 0 ; i < Len ; ++i)
*(tarArr+i) = *(sourceArr+i);
}
void copy_arr(const double sourceArr[] , double tarArr[] , int Len)
{
for(int i = 0 ; i < Len ; ++i)
tarArr[i] = sourceArr[i];
}
第三题
#include<stdio.h>
#define LEN 10
int MaxInt(const int* arr , int Len);
int main(void)
{
int TestArr[LEN] = {1,2,3,4,5,6,7,8,9,50};
printf("Max Integer Is %d\n",MaxInt(TestArr,LEN));
return 0;
}
int MaxInt(const int* arr , int Len)
{
int Max = *arr;
for(int i = 0 ; i < Len ; ++i)
{
if(Max < *(arr+i))
Max = *(arr+i);
}
return Max;
}
第四题
#include<stdio.h>
#define LEN 10
int MaxIndex(const double* arr , int Len);
int main(void)
{
double TestArr[LEN] = {1.1,2.2,3.3,4.1,5.2,6.3,7.1,8.3,9.8,50.1};
printf("Max Integer Is %d\n",MaxIndex(TestArr,LEN));
return 0;
}
int MaxIndex(const double* arr , int Len)
{
int maxIndex = 0;
double Max = *arr;
for(int i = 0 ; i < Len ; ++i)
{
if(Max < *(arr+i))
maxIndex = i;
}
return maxIndex;
}
第五题
#include<stdio.h>
#define LEN 10
double Lenght(const double* arr , int Len);
int main(void)
{
double TestArr[LEN] = {1.1,2.2,3.3,4.1,5.2,6.3,7.1,8.3,9.8,50.1};
printf("Result Is %.2lf\n",Lenght(TestArr,LEN));
return 0;
}
double Lenght(const double* arr , int Len)
{
double Max = *arr;
double Min = *arr;
for(int i = 0 ; i < Len ; ++i)
{
if(Max < *(arr+i))
Max = *(arr+i);
if(Min > *(arr+i))
Min = *(arr+i);
}
return Max-Min;
}
第六题
#include<stdio.h>
#define COLUMN 5
#define ROW 4
void copy_ptr(const double (*sourceArr)[COLUMN] , double (*tarArr)[COLUMN] , int Len);
int main(void)
{
const double sourceArr[ROW][COLUMN] = {
{1.1,2.2,3.3,4.4,5.5},
{1.1,1.1,1.1,1.1,1.1},
{3.3,3.1,3.2,6.7,8.6},
{4.4,4.4,4.4,4.4,4.4} };
double targetArr[ROW][COLUMN];
copy_ptr(sourceArr,targetArr,ROW);
for(int i = 0 ; i < ROW ; ++i)
{
for(int j = 0 ; j < COLUMN ; ++j)
printf("%-5.2lf",*(*(targetArr+i)+j));
printf("\n");
}
return 0;
}
void copy_ptr(const double (*sourceArr)[COLUMN] , double (*tarArr)[COLUMN] , int Len)
{
for(int i = 0 ; i < Len ; ++i)
{
for(int j = 0 ; j < COLUMN ; ++j)
*(*(tarArr+i)+j) = *(*(sourceArr+i)+j);
}
}
第七题
#include<stdio.h>
#define LEN 3
#define Index 2
void copyPtr(const int* sourceArr , int* targetArr , int Len);
int main(void)
{
int sourceArray[7] = {1,2,3,4,5,6,7};
int targetArray[LEN];
copyPtr(sourceArray+Index,targetArray,LEN);
for(int i = 0 ; i < LEN ; ++i)
printf("%-3d",*(targetArray+i));
return 0;
}
void copyPtr(const int* sourceArr , int* targetArr , int Len)
{
for(int i = 0 ; i < Len ; ++i)
*(targetArr+i) = *(sourceArr+i);
}
第八题
#include<stdio.h>
#define ROW 3
#define COLUMN 5
void copyPtr(int column , int row , const int sourceArr[row][column] , int targetArr[row][column]);
void showArray(int column , int row , int Arr[ROW][column]);
int main(void)
{
const int sourceArray[ROW][COLUMN] = {
{1,2,3,4,5},
{6,7,8,9,10},
{11,12,13,14,15} };
int targetArray[ROW][COLUMN];
copyPtr(COLUMN,ROW,sourceArray,targetArray);
showArray(COLUMN,ROW,targetArray);
return 0;
}
void copyPtr(int column , int row , const int sourceArr[row][column] , int targetArr[row][column])
{
for(int i = 0 ; i < row ; ++i)
{
for(int j = 0 ; j <column ; ++j)
targetArr[i][j] = sourceArr[i][j];
}
}
void showArray(int column , int row , int Arr[ROW][column])
{
for(int i = 0 ; i < row ; ++i)
{
for(int j = 0 ; j < column ; ++j)
printf("%-5d",Arr[i][j]);
printf("\n");
}
}
第九题
#include<stdio.h>
#define LEN 5
void sumArray(const int* sourceArr_1 , const int* sourceArr_2 , int* targetArr , int Len);
int main(void)
{
int Arr_1[LEN] = {1,2,3,4,5};
int Arr_2[LEN] = {6,7,8,9,10};
int sumArr[LEN];
sumArray(Arr_1,Arr_2,sumArr,LEN);
for(int i = 0 ; i < LEN ; ++i)
printf("%-5d",*(sumArr+i));
return 0;
}
void sumArray(const int* sourceArr_1 , const int* sourceArr_2 , int* targetArr , int Len)
{
for(int i = 0 ; i < Len ; ++i)
*(targetArr+i) = *(sourceArr_1+i) + *(sourceArr_2+i);
}
第十题
#include<stdio.h>
#define ROW 3
#define COLUMN 5
void doubleArray(int (*arr)[COLUMN] , int Len);
void showArray(int (*arr)[COLUMN] , int Len);
int main(void)
{
int TestArray[ROW][COLUMN] = {
{1,2,3,4,5},
{6,7,8,9,10},
{11,12,13,14,15} };
printf("SourceArray\n");
showArray(TestArray,ROW);
doubleArray(TestArray,ROW);
printf("DoubleArray\n");
showArray(TestArray,ROW);
return 0;
}
void doubleArray(int (*arr)[COLUMN] , int Len)
{
for(int i = 0 ; i < Len ; ++i)
{
for(int j = 0 ; j < COLUMN ; ++j)
*(*(arr+i)+j) *= 2;
}
}
void showArray(int (*arr)[COLUMN] , int Len)
{
for(int i = 0 ; i < Len ; ++i)
{
for(int j = 0 ; j < COLUMN ; ++j)
printf("%-4d",*(*(arr+i)+j));
printf("\n");
}
}
第十一题
#include<stdio.h>
#define Months 12
#define Years 5
float showSumRain(const float (*arr)[Months] , int Len);
void showAvgRain(const float (*arr)[Months] , int Len);
int main(void)
{
const float rain[Years][Months] = {
{4.3,4.3,4.3,3.0,2.0,1.2,0.2,0.5,2.1,3.6,1.1,0.9},
{1.1,2.2,2.2,2.2,1.1,2.2,3.3,1.2,2.1,2.2,3.3,2.1},
{1.2,3.1,0.2,0.4,1.5,1.4,1.8,2.4,2.6,2.5,3.1,1.7},
{1.1,4.2,3.3,2.2,1.5,2.9,4.2,1.1,2.4,3.9,0.9,0.7},
{3.1,2.8,1.9,1.8,1.3,2.9,3.1,1.1,0.8,0.8,0.5,1.5}
};
printf("YEAR RAINFALL\n");
float SumRain = showSumRain(rain,Years);
printf("THe Yearly Average Is %.2F Inches.\n",SumRain/Years);
printf("Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec\n");
showAvgRain(rain,Years);
return 0;
}
float showSumRain(const float (*arr)[Months] , int Len)
{
float SumRain = 0;
for(int Y = 0 ; Y < Len ; ++Y)
{
float RainOfYear = 0;
for(int M = 0 ; M < Months ; ++M)
RainOfYear += *(*(arr + Y) + M);
printf("M .1f\n",2000+Y,RainOfYear);
SumRain += RainOfYear;
}
return SumRain;
}
void showAvgRain(const float (*arr)[Months] , int Len)
{
for(int M = 0 ; M < Months ; ++M)
{
float RainOfMonth = 0;
for(int Y = 0 ; Y < Len ; ++Y)
RainOfMonth += *(*(arr + Y) + M);
printf("%-4.1f",RainOfMonth/Months);
}
}
