我忘了包含编程语言(它应该是C语言)。
我在做这个程序时需要帮助。我们非常感谢示例代码。
程序读取包含以下内容的文件:
一个。要排序的整数数,后跟 湾要排序的整数(每行一个整数)(必须与指定的整数数相同)。
然后将从另一个文本文件和二进制文件中从最低到最高进行排序。
其他规格:
终端中的格式应为:
./program.out original-file.txt output-file.txt output-file.bin
其中program.out
是程序本身,original-file.txt
是文本文件,其中包含要排序的整数数和未排序的整数,output-file.txt
和output-file.bin
包含排序整数。
错误检查:
原始文件将如下所示:
3 #number of integers to be sorted
3 #the integers-separated by new line
2
1
输出文件:
3
1
2
3
提前非常感谢:)上帝保佑!
答案 0 :(得分:0)
以下是一些示例代码。如果你谷歌这些功能名称,如果你在课堂上保持清醒,我相信你会做得很好。你可能需要:
打开一个文件:
FILE* inFile = fopen("input.txt", "r");
从输入中读取单个值
int numConverted = fscanf(inFile, "%d", &value);
分配一些内存:
int *pInts = malloc(n * sizeof(int));
对数组进行排序
// The parameters are tricky! Check your class notes or text book
qsort(...)
将单个值写为文本
fprintf(outFile, "%d\n", i);
将单个值写为二进制:
fwrite( &i, sizeof i, 1, outBinFile);
答案 1 :(得分:0)
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
struct tree {
int num, cnt;
struct tree *left, *right;
};
struct tree *add(struct tree *t, int val) {
if (!t) {
if (!(t = malloc(sizeof(struct tree))))
perror("Not enough memory"), exit(-1);
memset(t, 0, sizeof(struct tree));
t->num = val;
++t->cnt;
return t;
}
if (val < t->num)
t->left = add(t->left, val);
else if (val > t->num)
t->right = add(t->right, val);
else
++t->cnt;
return t;
}
int walk(struct tree *t, int (*f)(struct tree *, void*), void *data) {
int rc;
if (!t)
return 0;
rc = walk(t->left, f, data);
rc += f(t, data);
rc += walk(t->right, f, data);
return rc;
}
struct tree *clean(struct tree *t) {
if (!t)
return NULL;
t->left = clean(t->left);
t->right = clean(t->right);
free(t);
return NULL;
}
int save(struct tree *t, void *data) {
int i, rc = 0;
FILE *fp = (FILE *) data;
for (i = 0; i < t->cnt; ++i)
rc += (fprintf(fp, "%d\n", t->num) < 0);
return rc;
}
int saveb(struct tree *t, void *data) {
int i, rc = 0;
FILE *fp = (FILE *) data;
for (i = 0; i < t->cnt; ++i)
rc += (fwrite((void *) &t->num, sizeof t->num, 1, fp) != 1);
return rc;
}
int main(int argc, char **argv) {
int rc = 0;
struct tree *t = NULL;
char buff[0x200];
FILE *fin, *fout, *foutb;
if (argc < 4) {
fprintf(stderr, "Usage: %s SRCFILE OUTFILE.TXT OUTFILE.BIN\n", argv[0]);
exit(0);
}
if (!((fin = fopen(argv[1], "r")) && (fout = fopen(argv[2], "w"))
&& (foutb = fopen(argv[3], "wb")))) {
perror("fopen");
exit(-1);
}
while (fgets(buff, sizeof buff, fin))
t = add(t, atoi(buff));
rc += walk(t, save, (void *) fout);
rc += walk(t, saveb, (void *) foutb);
t = clean(t);
fclose(fin);
fclose(fout);
fclose(foutb);
return rc;
}
刚刚注意到“文件的第一个字符串中的整数数”规范;我认为你的老师会把它们放入阵列并对其进行排序;但无论如何要自己做:)
#include <stdio.h>
#include <stdlib.h>
int cmp(const void *a, const void *b) {
return *(int*)a > *(int*)b ? 1 : (*(int*)a < *(int*)b ? -1 : 0);
}
int main(int argc, char **argv) {
char buff[0x200];
FILE *fin, *fout, *foutb;
int i, *arr, sz = 0, rc = 0;
if (argc < 4) {
fprintf(stderr, "Usage: %s SRCFILE OUTFILE.TXT OUTFILE.BIN\n", argv[0]);
exit(0);
}
if (!((fin = fopen(argv[1], "r")) && (fout = fopen(argv[2], "w"))
&& (foutb = fopen(argv[3], "wb")))) {
perror("fopen");
exit(-1);
}
if (fgets(buff, sizeof buff, fin)) {
sz = atoi(buff);
if (!(arr = malloc(sizeof(int) * sz)))
perror("Not enough memory"), exit(-1);
for (i = 0; i < sz && fgets(buff, sizeof buff, fin); ++i)
arr[i] = atoi(buff);
}
qsort(arr, sz, sizeof(int), cmp);
for (i = 0; i < sz; ++i)
rc += (fprintf(fout, "%d\n", arr[i]) < 0);
for (i = 0; i < sz; ++i)
rc += (fwrite((void *) &arr[i], sizeof(int), 1, foutb) != 1);
fclose(fin);
fclose(fout);
fclose(foutb);
return rc;
}