如何在C中創建自定義文件名？

Question

請參閱這段代碼：

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

int main() { 
    int i = 0; 
    FILE *fp; 
    for(i = 0; i < 100; i++) { 
     fp = fopen("/*what should go here??*/","w"); 
     //I need to create files with names: file0.txt, file1.txt, file2.txt etc 
     //i.e. file{i}.txt 
    } 
} 

Answer 1

for(i = 0; i < 100; i++) { 
    char filename[sizeof "file100.txt"]; 

    sprintf(filename, "file%03d.txt", i); 
    fp = fopen(filename,"w"); 
} 

Answer 2

這應該工作：

for(i = 0; i < 100; i++) { 
    char name[12]; 
    sprintf(name, "file%d.txt", i); 
    fp = fopen(name, "w"); 
} 

Answer 3

使用snprintf()與"file%d.txt" and i`生成的文件名。

Answer 4

調查snprintf。

Answer 5

char szFileName[255] = {0}; 
for(i = 0; i < 100; i++) 
{ 
    sprintf(szFileName, "File%d.txt", i); 
    fp = fopen(szFileName,"w"); 
}