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法律研究C 程式用於查詢檔案的大小
該程式為利用 C 語言編寫的，用於查詢檔案的大小。
演算法
Begin function findfileSize() Open a file pointer fp in read only mode. If fp is equals to null then Print “File not found” and return -1. Else count the file size. Close the file. Put the file pointer at the beginning of the file Declare a integer variable result and initialize it with the output of the ftell() function. Close file pointer fp. Return result. End
示例
#include <stdio.h>
int findfileSize(char f_n[]) {
FILE* fp = fopen(f_n, "r"); // opening a file in read mode
if (fp == NULL) // checking whether the file exists or not {
printf("File Not Found!\n");
return -1;
}
fseek(fp, 0L, SEEK_END);
int res = ftell(fp); //counting the size of the file
fclose(fp); //closing the file
return res;
}
int main() {
char f_n[] = { "b.txt" }; //file name is “b.txt” whose size is to be determined
int result = findfileSize(f_n);
if (result != -1)
printf("Size of the file is %ld bytes \n", result); //printing the file size
return 0;
}輸出
Size of the file is 2649 bytes
更新時間： 30-Jul-2019
2K+ 次檢視
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