CODEWITHSUNDEEP
c++11scanf
Ian Young
Ian Young

Reputation: 1746

Correct use of sscanf_s

I'm trying to parse a string into a char and multiple floats in the following format:

v 1.00000 1.00000 1.00000

Originally using sscanf I could do so with:

char b;
float x = 0.0f;
float y = 0.0f;
float z = 0.0f;
int result = sscanf(lineHeader,"%c %f %f %f", &b, &x, &y, &z);

However, I'm trying to eliminate an unrelated problem which requires me to use sscanf_s.

If I simply change the code to:

int result = sscanf_s(lineHeader,"%c %f %f %f", &b, &x, &y, &z);

I get an exception stating an unsigned integer is expected. Does sscanf_s use different formatting to parse strings?

Upvotes: 0

Views: 2268

Answers (1)

Quentin
Quentin

Reputation: 63124

According to the documentation, sscanf_s's %c conversion specifier requires an additional parameter to check for the buffer size:

int result = sscanf_s(lineHeader,"%c %f %f %f", &b, rsize_t{1}, &vertex.x, &vertex.y, &vertex.z);
//                               It's a single char ^^^^^^^^^^

Upvotes: 1

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