Compilare: main.cpp: In function 'int main()': main.cpp:11:10: warning: unused variable 'c' [-Wunused-variable] char c; ^ main.cpp:12:38: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d %d %d\n",&n,&m,&l); ^ main.cpp:13:23: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%s",s); ^ main.cpp:36:27: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%s",s); ^