Compilare: user.cpp: In function ‘void findc(int, char)’: user.cpp:20:11: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(matc[i][j]==c) ^ user.cpp: In function ‘int main()’: user.cpp:108:31: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d %d\n",&n,&m); ^ user.cpp:111:28: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets(matc[i],N,in); ^