Question

I have a C program that parses a configuration file. The configuration file allows some wildchars in the format
option=%any.

The problem is that when I use strcmp to compare the value, I get an illegal instruction error.

Sample program to illustrate this:

char str1[10];
sprintf(str1,"%any");

if(strcmp(str1,"%any") == 0) 
        printf("match\n");

return 0;

Output:

$ ./a.out
Illegal instruction

printf also throws this error.

With
printf(“%s\n”,str1);

output is:

$ ./a.out
0x0.07fff00000001p-1022ny
Illegal instruction

I tried escaping, i.e using “\%any” instead of “%any” in sprintf; but this doesn’t help.

In C++, with std::string == comparison, and printing using cout seems to be working fine.

Could some one please help me to find out how to do this with C.

Answer 1

It comes from sprintf.

#include <stdio.h>

sprintf(str1, "%%any");

As Paul R. stated, you can use rather strcpy to don’t worry about these formats.