How to generate filename sequence

Question

I am looking to add multiple parts to a parameter.

Like this, I know know in VB.net i can do

messagebox("hello" + textbox1.text) // yields hello and whatever is in textbox1

but how would I do this in C?

I tried & and + but it give me errors.

i want to create 5 files, and use a for loop to create them, counting 1-5

ofp = fopen("data" + (loop counter) + ".txt", "r"); // allong those lines...

so the file name would be data1.txt;data2.txt;data3.txt so forth.

thanks

helper functions like strcpy can help. See http://stackoverflow.com/questions/308695/c-string-concatenation — MaMazav, Dec 26 '13 at 18:59
"How to add multiple amounts of info to one parameter?" - to this question, the answer is "use a `struct`". What you are **really** looking for is concatenating strings. — , Dec 26 '13 at 19:00
take a look at [sprintf](http://www.cplusplus.com/reference/cstdio/sprintf) — Alexej Magura, Dec 26 '13 at 19:13

user877329 · Accepted Answer · 2013-12-26T19:06:41.947

0

In this case, you may use snprintf:

char buffer[FILENAME_MAX];
snprintf(buffer,FILENAME_MAX,"data%d.txt",counter+1); //You will probably start counter at 0

buffer[FILENAME_MAX-1]=0;// snprintf may skip null terminator.
FILE* ofp=fopen(buffer,"w");
//...
fclose(ofp);

edited Dec 26 '13 at 19:06

answered Dec 26 '13 at 18:58

user877329

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The second argument to `snprintf()` could be `FILENAME_MAX` (or even better, `sizeof buffer`). – Dec 26 '13 at 19:00

How to generate filename sequence

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