高级语言程序设计课程第八次个人作业
这个作业属于哪个课程：https://edu.cnblogs.com/campus/fzu/2024C
这个作业要求在哪里：https://edu.cnblogs.com/campus/fzu/2024C/homework/13307
学号：102300108
姓名：陈茜蕾
11.13
第一题
第二题
第三题
问题：一开始没有输出，返回 str 时，它指向的是字符串的末尾
解决：用s来指向str整个字符串
第六题
#include<stdio.h>
#include<string.h>
#include<ctype.h>
#pragma warning (disable:4996)
bool is_within(char*str,char ch) {
while (*str != '\0') {
if (ch == *str) {
return true;
}
*str++;
}
return false;
}
int main() {
char s[50];
int n = 0;
char ch;
scanf("%s", s);
while ((ch=getchar())!=EOF) {
if (ch == '\n') {
continue;
}
if (is_within(s, ch))
{
printf("ch is found.\n");
}
else {
printf("ch is not found.");
}
}
return 0;
}
第七题
12.9
第一题
问题：对于函数中的scanf还是加了&，但传进去的已经是地址
解决：去掉&
第二题
头文件
include <stdio.h>
include<string.h>
include<ctype.h>
pragma warning (disable:4996)
void set_mode(int mode);
void get_info();
void show_info();
static int mode;
static double dist;
static double fuel;
源文件
include "pe12-2a.h"
void set_mode(int mode) {
if (!(mode == 0 || mode == 1)&&mode!=-1) {
printf("Invalid mode specified. Mode 1(US) used.\n");
mode = 1;
}
}
void get_info() {
if (mode == 0) {
printf("Enter distance traveled in kilometers:");
}
else {
printf("Enter distance traveled in miles:");
}
scanf("%lf", &dist);
if (mode == 0) {
printf("Enter fuel consumed in liters:");
}
else {
printf("Enter fuel consumed in gallons:");
}
scanf("%lf", &fuel);
}
void show_info() {
printf("Fuel consumption is ");
if (mode == 0) {
printf("Fuel consumption is %.2lf liters per 100 km.\n", fuel * 100.0 / dist);
}
else {
printf("Fuel consumption is %.1lf miles per gallon.\n", dist / fuel);
}
}
主代码
// pe12-2b.c
// 与 pe12-2a.c 一起编译
include "pe12-2a.h"
int main(void)
{
int mode;
printf("Enter 0 for metric mode, 1 for US mode: ");
scanf("%d", &mode);
while (mode >= 0)
{
set_mode(mode);
get_info();
show_info();
printf("Enter 0 for metric mode, 1 for US mode");
printf(" (-1 to quit): ");
scanf("%d", &mode);
}
printf("Done.\n");
return 0;
}
第三题
头文件
include <stdio.h>
include<string.h>
include<ctype.h>
pragma warning (disable:4996)
define METRIC 0
define US 1
void set_mode(int* pm);
void get_info(int mode, double* pd, double* pf);
void show_info(int mode, double distance, double fuel);
源文件
// compile with pe12-3b.c
include "pe12-3a.h"
void set_mode(int* pm)
{
if (*pm != METRIC && pm != US)
{
printf("Invalid mode specified. Mode 1(US) used.\n");
pm = 1;
}
}
void get_info(int mode, double pd, double pf)
{
if (mode == METRIC)
printf("Enter distance traveled in kilometers: ");
else
printf("Enter distance traveled in miles: ");
scanf("%lf", pd);
if (mode == METRIC)
printf("Enter fuel consumed in liters: ");
else
printf("Enter fuel consumed in gallons: ");
scanf("%lf", pf);
}
void show_info(int mode, double distance, double fuel)
{
printf("Fuel consumption is ");
if (mode == METRIC)
printf("%.2f liters per 100 km.\n", 100 * fuel / distance);
else
printf("%.1f miles per gallon.\n", distance / fuel);
}
主函数
include "pe12-3a.h"
int main(void)
{
int mode;
double distance, fuel;
printf("Enter 0 for metric mode, 1 for US mode: ");
scanf("%d", &mode);
while (mode >= 0)
{
set_mode(&mode);
get_info(mode, &distance, &fuel);
show_info(mode, distance, fuel);
printf("Enter 0 for metric mode, 1 for US mode");
printf(" (-1 to quit): ");
scanf("%d", &mode);
}
printf("Done.\n");
return 0;
}
第八题
include <stdio.h>
include<malloc.h>
pragma warning (disable:4996)
int* make_array(int elem, int val);
void show_array(const int ar[], int n);
int main(void)
{
int* pa;
int size;
int value;
printf("Enter the number of elements: ");
while (scanf("%d", &size) == 1 && size > 0)
{
printf("Enter the initialization value: ");
scanf("%d", &value);
pa = make_array(size, value);
if (pa)
{
show_array(pa, size);
free(pa);
}
printf("Enter the number of elements (<1 to quit): ");
}
printf("Done.\n");
return 0;
}
int* make_array(int elem, int val)
{
int* arr = (int*)malloc(elem * sizeof(int));
for (int i = 0; i < elem; i++) {
arr[i] = val;
}
return arr;
}
void show_array(const int ar[], int n)
{
for (int i = 0; i < n; i++)
{
printf("%d ", ar[i]);
if ((i + 1) % 8 == 0) {
printf("\n");
}
}
putchar('\n');
}
第九题
include <stdio.h>
include<malloc.h>
include<string.h>
pragma warning (disable:4996)
int main(void)
{
int cnt;
printf("你想读入几个单词？ ");
scanf("%d", &cnt);
getchar();
char** p = (char**)malloc(cnt * sizeof(char));
int pi = 0;
char tmp[100];
char ptmp = tmp;
printf("请输入\n");
for (int i = 0; i < cnt; i++)
{
scanf("%s", tmp, sizeof(tmp));
int length = strlen(tmp);
p[i] = (char*)malloc((length + 1) * sizeof(char));
strcpy(p[i], tmp);
}
printf("读入单词如下：\n");
for (int i = 0; i < cnt; i++)
{
printf("%s\n", p[i]);
}
for (int i = 0; i < cnt; i++) {
free(p[i]);
}
free(p);
}
