ferma1.cpp: In function 'int main()': ferma1.cpp:32: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result ferma1.cpp:35: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result ferma1.cpp:70: warning: 'rx' may be used uninitialized in this function ferma1.cpp:70: warning: 'ry' may be used uninitialized in this function ferma1.cpp:71: warning: 'rc' may be used uninitialized in this function