centrale.cpp: In function 'int rev(int)': centrale.cpp:9: warning: unused variable 'p' centrale.cpp: In function 'int main()': centrale.cpp:41: warning: unused variable 'r' centrale.cpp:44: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result centrale.cpp:48: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result centrale.cpp: In function 'int rev(int)': centrale.cpp:8: warning: 'c' may be used uninitialized in this function