嗨。
正如你可能看到的,我试图从日志文件中的C项目中保存最近的数据,其中的文件名与实际的时间/日期相对应。
虽然路径在控制台内部组合并正确显示,但文件本身始于一个奇怪的点,更确切地说是一个空格,后面跟着该点和另一个空格,显示在图片中。
我使用Windows 7 64位和cygwin64。
代码的相关位是:
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <string.h>
void save_to_file(char* timestamp, char* homepath, int generation)
char* create_timestamp(char* timestamp)
int main(){
char homepath[28] = "D:\\cygwin64\\home\\ignite\\log\\";
int generation = 0;
char* timestamp = malloc (30 * sizeof(char));
create_timestamp(timestamp);
save_to_file(timestamp, homepath, generation);
}
void save_to_file(char* timestamp, char* homepath, int generation){
char string[4];
char logchar[4] = "log";
char dot[] = {"."};
char fileend[5] = {".txt"};
char* path = malloc(60*sizeof(char));
strcpy(path, homepath);
strcat(path, logchar);
snprintf(string, 4, "%d", generation);
strcat(path, string);
strcat(path, dot);
strcat(path, timestamp);
strcat(path, fileend);
FILE* f = fopen(path, "ab+");
if(f == NULL){
printf("Error opening file!\n");
exit(1);
}
else{
//write to file
}
}
char* create_timestamp(char* timestamp){
time_t rawtime;
struct tm *info;
char buffer[30], *string, *work;
string = malloc (5* sizeof(char));
work = malloc (30* sizeof(char));
char point[] = {"."};
time(&rawtime);
info = localtime(&rawtime);
strcpy(buffer, asctime(info));
int n = info->tm_mday;
snprintf(string, 4, "%d", n);
strcpy(work, string);
n = (int) info->tm_mon + 1;
snprintf(string, 3, "%d", n);
strcat(work, point);
strcat(work, string);
///*
n = info->tm_year + 1900;
snprintf(string, 5, "%d", n);
strcat(work, point);
strcat(work, string);
n = info->tm_hour;
snprintf(string, 3, "%d", n);
strcat(work, point);
strcat(work, string);
n = info->tm_min;
snprintf(string, 3, "%d", n);
strcat(work, point);
strcat(work, string);
n = info->tm_sec;
snprintf(string, 3, "%d", n);
strcat(work, point);
strcat(work, string);
strcpy(timestamp, work);
free(string);
return timestamp;
}
向我们展示如何获得'homepath'? –
您是使用Windows还是Linux?如上所述,您所展示的不是相关代码的所有内容。包括足够的东西,以便提供的东西可以编译。 – ryyker
请参阅[如何创建最小,完整和可验证示例](http://stackoverflow.com/help/mcve)。你的代码使用了你没有定义的几个变量(例如'homepath','generation','timestamp'),这些变量都被用在这个代码块中。你的代码应该包含一个完整的例子,如果需要的话,我们可以复制/粘贴和编译。 –