c++将txt含序号的xyz中间用，隔开输出为只有xyz的txt文件，提供一段c++代码处理

以下是处理代码：

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#define MAX_LINE_LENGTH 1024

int main(int argc, char *argv[]) {
if (argc != 3) {
printf("Usage: %s input_file output_file\n", argv[]);
return 1;
}

FILE *input_file = fopen(argv[1], "r");
if (input_file == NULL) {
printf("Failed to open input file: %s\n", argv[1]);
return 1;
}

FILE *output_file = fopen(argv[2], "w");
if (output_file == NULL) {
printf("Failed to open output file: %s\n", argv[2]);
fclose(input_file);
return 1;
}

char line[MAX_LINE_LENGTH];
int line_number = ;
while (fgets(line, MAX_LINE_LENGTH, input_file) != NULL) {
line_number++;
char *comma_position = strchr(line, ',');
if (comma_position == NULL) {
printf("Invalid input format at line %d: %s", line_number, line);
fclose(input_file);
fclose(output_file);
return 1;
}
*comma_position = '\';
fprintf(output_file, "%s\n", line);
}

fclose(input_file);
fclose(output_file);
return ;
}

你觉得这段代码有什么需要改进的地方吗？