v.cpp: In function 'int main()': v.cpp:10: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result v.cpp:13: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result v.cpp:9: warning: 'l' may be used uninitialized in this function v.cpp:9: warning: 'c' may be used uninitialized in this function