intervale.cpp: In function 'int main()': intervale.cpp:18: warning: array subscript has type 'char' intervale.cpp:22: warning: array subscript has type 'char' intervale.cpp:30: warning: array subscript has type 'char' intervale.cpp:30: warning: array subscript has type 'char' intervale.cpp:32: warning: array subscript has type 'char' intervale.cpp:16: warning: ignoring return value of 'char* fgets(char*, int, FILE*)', declared with attribute warn_unused_result intervale.cpp:24: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result intervale.cpp:27: warning: ignoring return value of 'char* fgets(char*, int, FILE*)', declared with attribute warn_unused_result