resturi.cpp: In function 'int main()': resturi.cpp:37: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result resturi.cpp:39: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result resturi.cpp:32: warning: 'b' may be used uninitialized in this function