fgets set to char * causes segmentation fault, Dynamic string

Question

I'm writing a program in c that looks through a standardly inputted text file with lines "string int". I had the program running fine with scanf originally, but now the name has to be a dynamic string(size known at runtime) and when I switched the name in grade_entry to a pointer it started segmentation faulting

typedef struct grade_entry {
       char *name;
       int grade;
} grade_entry;

struct grade_entry grade_list[100];

int main(){
    int grade;
    int done;
    int i=0;
    do{
            puts("not weee\n");
            done=(int)strlen(gets(grade_list[i].name));
            puts("weee\n");
    }while(1);
}

compiles and current output is:

not weee

segmentation fault(core dumped)

**Resolved: I allocated the pointer and then reallocated for size+1, adding the null to The end. It's unfortunate that I can't malloc immediately based off of the temp memory for scanf,fgets,gets. Oh well, thank you everyone for the help

Answer 1

You have to allocate memory to grade_entry.name, otherwise it is a char pointer pointing to an arbitrary memory location and writing to it is causing segmentation fault.