i already have a "complex" program, so i want to use following code if possible:
const char* path = filename.c_str();
FILE * file = fopen(path, "r");
if( file == NULL ) {
printf("Obj File was not found");
return 0;
} else {
std::ifstream input(path);
std::string line;
while( std::getline( input, line ) ) {
string sub;
iss >> sub;
// here i read in a lot of lines which are in sub
}
}
now i need to seperate a line like this:
f 2/3/1 3/4/1 4/6/1
and found fscanf which should work like
fscanf(file, "%d/%d/%d %d/%d/%d %d/%d/%d\n", &a, &b, &c, &d, &e, &f, &g, &h, &i);
but "file" must be a file. how can i input a string (sub in this case) into fscanf or is there another easy solution to read this line as short as possible.
您需要sscanf()函数。
sscanf(sub, "%d/%d/%d %d/%d/%d %d/%d/%d\n", &a, &b, &c, &d, &e, &f, &g, &h, &i);
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