Question

I am parsing a file for particular keyword matching by C program,
here is my sample code…

#include <stdio.h>

int main() { 

    FILE *infile = fopen("Somefile.txt", "r");

    char buffer[256];
    char value[128];

    while (fgets(buffer, sizeof(buffer), infile))
        if (1 == sscanf(buffer, " x = %s", value))
            printf("Value = %s\n", value);
    return 0;
}

Somefile.txt

some junk
#a comment
a = 1 ; a couple other variables.
b = 2
x = 3
 x = 4
x=5
x = Hi hello

Output:

Value = 3
Value = 4
Value = 5
Value = Hi

Problem : when x contain the value like “Hi Hello”, then it just parsing “Hi” only, I want to parse whole value of x without loosing space.

please suggest me solution for it.

Thanks.

Answer 1

In this line of your code:

if (1 == sscanf(buffer, " x = %s", value))

%s means to read in one word.

If you want to read in the rest of the line, use %[^\n]s like this:

if (1 == sscanf(buffer, " x = %[^\n]s", value))