rima.cpp: In function 'int main()': rima.cpp:13: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result rima.cpp:18: warning: ignoring return value of 'char* fgets(char*, int, FILE*)', declared with attribute warn_unused_result rima.cpp:37: warning: ignoring return value of 'char* fgets(char*, int, FILE*)', declared with attribute warn_unused_result rima.cpp:56: warning: ignoring return value of 'char* fgets(char*, int, FILE*)', declared with attribute warn_unused_result rima.cpp:75: warning: ignoring return value of 'char* fgets(char*, int, FILE*)', declared with attribute warn_unused_result rima.cpp:10: warning: 'p1' may be used uninitialized in this function rima.cpp:10: warning: 'p2' may be used uninitialized in this function rima.cpp:10: warning: 'p3' may be used uninitialized in this function rima.cpp:10: warning: 'p4' may be used uninitialized in this function