hello everyone,
There is an error with the struct, the message of error is this:
Code:error:incompatible types in assignment
What i should change in my code?Code:#include <stdio.h> struct RegisterUser{ char name[10]; int age; }user; int main(){ user.name = "Someone"; //There is the error }
Thanks
Problem: If you try to copy a string larger than user.name can hold, you can cause a security flaw in your program and cause hard to find bugs. Consider using something like:Code:strcpy(user.name,"Someone");
Code:strncpy(user.name,"Someone",sizeof(user.name));
But beware that strncpy by itself doesn't guarantee a \0 at the end, thus potentially causing other problems.
Code:#include <stdio.h> #include <string.h> void safer_strncpy ( char *dst, const char *src, size_t len ) { strncpy( dst, src, len ); if ( dst[len-1] != '\0' ) { fprintf(stderr,"%s truncated at %lu characters\n", src, (unsigned long)len-1 ); } dst[len-1] = '\0'; } int main ( ) { char dst[5]; safer_strncpy( dst, "this", sizeof(dst) ); printf("%s\n",dst); safer_strncpy( dst, "world", sizeof(dst) ); printf("%s\n",dst); return 0; }
If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
If at first you don't succeed, try writing your phone number on the exam paper.
