如何检查我从.c文件读取的行是否包含#include <something> ？

Question

I got an issue working on a task. I am making different exercises in C (I can't include any c++ libraries).

I should read from a .c file and output everything in a .o file solving as well this specification.

"A line that begins with #include “filename.h” should be replaced with the entire contents of the file called filename.h."

void writefile(int size, int *data, *file_path) {

    char outputFile[30];
    if (strcmp(file_name, "string_functions.c") == 0) {
        outputFile = "CW1_test_files/string_functions.o";
    }
    else outputFile = "CW1_test_files/math_functions.o";
    FILE *file;
    file = fopen(outputFile, "w");

    //In questo modo andiamo a verificare se e' opportuno ignorare o meno i commenti.
    int numberOfLines = 0;
    int numberOfComments = 0;

    if (file == NULL) {
        printf("Could not open file %s", filename);
        return -1;
    }
    else {
        char *line[1000];
        char *include = "#include";
        char *define = "#define";
        char ch;
        // file is equals to fp1
        while ((ch = fget(file)) != EOF){
            if ((strcmp(line[i], " ") != 0) && (strcmp(line[i], "\n") != 0) && (strcmp(line[i], "\t") != 0)) numberOfLines++;
            if (strcmp(line[i], "/") = 0) && (strcmp(line[i + 1], "/") numberOfComments++; //check the comments
            else if ((strcmp(line[i], "/") != 0) && (strcmp(line[i], " ") != 0)) continue;


        }

        printf(strcat("Number of Comments in the file %s: %d", file_path, numberOfComments));
        printf(strcat("Number of non-empty lines in the file %s: %d", file_path, numberOfLines));



    }



    fclose(file);

    //svolgere qui il resto del programma
    //stampare il file,, gestire gli #incl
    for (int i = 0; i < size; i++) {


    }
    writefile(size, data);
}

Answer 1

The C standard specifies that a directive line has this form.

<maybe spaces> # <maybe spaces> DIRECTIVE-NAME .....

Before to check for this, you also need to cut out the '\\NEWLINE'. In order for your processing to be conforming with C, so to be able to process any valid file.

So you also need to skip the spaces before and after the # in your code and remve \\\\\\n .