tir.cpp: In function 'int main()': tir.cpp:8: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result tir.cpp:8: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result tir.cpp:7: warning: 'u' may be used uninitialized in this function tir.cpp:7: warning: 'v' may be used uninitialized in this function