TopographyData* m_topographyData = new TopographyData( inFileName, maxNumPoint, maxDist, eps );
时间: 2024-05-18 20:11:38 浏览: 26
这段代码是在C++中创建一个名为m_topographyData的指向TopographyData类对象的指针,并使用new运算符从堆内存中分配了一段内存空间来存储该对象。TopographyData类的构造函数需要传入四个参数:inFileName表示输入文件名,maxNumPoint表示最大点数,maxDist表示最大距离,eps表示误差范围。这个指针可以用来调用TopographyData类的成员函数或者访问该类的数据成员。需要注意的是,在使用完该指针指向的对象后,需要使用delete运算符来释放分配的内存空间,以避免内存泄漏。
相关问题
#include <stdio.h>#include <stdlib.h>int main() { FILE *fin, *fout; char inFileName[] = "fcopy.in"; char outFileName[] = "fcopy.out"; char c, prev = '\0'; fin = fopen(inFileName, "r"); if (fin == NULL) { printf("Cannot open %s\n", inFileName); exit(EXIT_FAILURE); } fout = fopen(outFileName, "w"); if (fout == NULL) { printf("Cannot open %s\n", outFileName); exit(EXIT_FAILURE); } while ((c = fgetc(fin)) != EOF) { if (c == ' ' || c == '\t') { if (prev != ' ' && prev != '\t') { fputc(' ', fout); } } else { fputc(c, fout); } prev = c; } fclose(fin); fclose(fout); return 0;}这段代码有错误,请修改它
这段代码没有明显的语法错误,但是可能存在逻辑问题。代码的作用是将一个文件中的内容复制到另一个文件中,并将连续的空格或制表符替换为单个空格。可能存在的问题包括:
1. 如果输入文件中存在连续的空格或制表符,则输出文件中只会保留一个空格,这可能不符合预期。
2. 如果输入文件以空格或制表符结尾,则输出文件中可能会有一个多余的空格。
3. 如果输入文件不存在,则程序会退出,而不是给出错误提示。
针对这些问题,可以对代码进行修改。例如,可以使用一个变量来记录连续的空格或制表符的数量,并根据需要输出多个空格。同时,可以在程序退出前给出错误提示,而不是直接退出程序。下面是修改后的代码:
```c
#include <stdio.h>
#include <stdlib.h>
int main() {
FILE *fin, *fout;
char inFileName[] = "fcopy.in";
char outFileName[] = "fcopy.out";
char c, prev = '\0';
int count = 0;
fin = fopen(inFileName, "r");
if (fin == NULL) {
printf("Cannot open %s\n", inFileName);
exit(EXIT_FAILURE);
}
fout = fopen(outFileName, "w");
if (fout == NULL) {
printf("Cannot open %s\n", outFileName);
exit(EXIT_FAILURE);
}
while ((c = fgetc(fin)) != EOF) {
if (c == ' ' || c == '\t') {
if (prev != ' ' && prev != '\t') {
if (count == 0) {
fputc(' ', fout);
}
count++;
}
} else {
if (count > 0) {
fputc(' ', fout);
count = 0;
}
fputc(c, fout);
}
prev = c;
}
if (count > 0) {
fputc(' ', fout);
}
fclose(fin);
fclose(fout);
return 0;
}
```
#include <stdio.h>#include <stdlib.h>int main() { FILE *fin, *fout; char inFileName[] = "fcopy.in"; char outFileName[] = "fcopy.out"; char c, prev = '\0'; int count = 0; fin = fopen(inFileName, "r"); if (fin == NULL) { printf("Cannot open %s\n", inFileName); exit(EXIT_FAILURE); } fout = fopen(outFileName, "w"); if (fout == NULL) { printf("Cannot open %s\n", outFileName); exit(EXIT_FAILURE); } while ((c = fgetc(fin)) != EOF) { if (c == ' ' || c == '\t') { if (prev != ' ' && prev != '\t') { if (count == 0) { fputc(' ', fout); } count++; } } else { if (count > 0) { fputc(' ', fout); count = 0; } fputc(c, fout); } prev = c; } if (count > 0) { fputc(' ', fout); } fclose(fin); fclose(fout); return 0;}此段代码有格式错误,请修改
#include <stdio.h>
#include <stdlib.h>
int main() {
FILE *fin, *fout;
char inFileName[] = "fcopy.in";
char outFileName[] = "fcopy.out";
char c, prev = '\0';
int count = 0;
fin = fopen(inFileName, "r");
if (fin == NULL) {
printf("Cannot open %s\n", inFileName);
exit(EXIT_FAILURE);
}
fout = fopen(outFileName, "w");
if (fout == NULL) {
printf("Cannot open %s\n", outFileName);
exit(EXIT_FAILURE);
}
while ((c = fgetc(fin)) != EOF) {
if (c == ' ' || c == '\t') {
if (prev != ' ' && prev != '\t') {
if (count == 0) {
fputc(' ', fout);
}
count++;
}
} else {
if (count > 0) {
fputc(' ', fout);
count = 0;
}
fputc(c, fout);
}
prev = c;
}
if (count > 0) {
fputc(' ', fout);
}
fclose(fin);
fclose(fout);
return 0;
}
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