fopen文件名以奇怪點開始

Question

嗨。

正如你可能看到的，我試圖從日誌文件中的C項目中保存最近的數據，其中的文件名與實際的時間/日期相對應。

雖然路徑在控制檯內部組合並正確顯示，但文件本身始於一個奇怪的點，更確切地說是一個空格，後面跟着該點和另一個空格，顯示在圖片中。

我使用Windows 7 64位和cygwin64。

代碼的相關位是：

#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; 
} 

Answer 1

你的陣列是太短了。 「D：\ cygwin64 \ home \ ignite \ log \」是29個字節。 - melpomene