Compilare: main.cpp: In function 'void Write()': main.cpp:47:9: warning: unused variable 'i' [-Wunused-variable] int i; ^ main.cpp: In function 'int main()': main.cpp:61:9: warning: unused variable 'n' [-Wunused-variable] int n,m,i,x,y; ^ main.cpp:61:11: warning: unused variable 'm' [-Wunused-variable] int n,m,i,x,y; ^ main.cpp:61:13: warning: unused variable 'i' [-Wunused-variable] int n,m,i,x,y; ^ main.cpp:61:15: warning: unused variable 'x' [-Wunused-variable] int n,m,i,x,y; ^ main.cpp:61:17: warning: unused variable 'y' [-Wunused-variable] int n,m,i,x,y; ^ main.cpp: In function 'void Read()': main.cpp:15:28: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d %d",&n,&m); ^ main.cpp:18:32: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d %d",&x,&y); ^