Compilare: main.cpp: In function 'int main()': main.cpp:73:26: warning: unused variable 'a1' [-Wunused-variable] unsigned int nrsol=0,a1,a2; ^~ main.cpp:73:29: warning: unused variable 'a2' [-Wunused-variable] unsigned int nrsol=0,a1,a2; ^~ main.cpp:38:24: warning: ignoring return value of 'char* fgets(char*, int, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fgets(s,10000005,f); ^ main.cpp:43:26: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%s",s2); ^