Compilare: user.cpp: In function ‘int main()’: user.cpp:48:15: warning: unused variable ‘z’ [-Wunused-variable] int i,j,q,z,X,Y,poz,r,ok; ^ user.cpp: In function ‘int cmmdc(int, int)’: user.cpp:32:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.cpp: In function ‘int cauta(int, int, int)’: user.cpp:44:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.cpp: In function ‘int main()’: user.cpp:51:34: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d %d %d",&m,&n,&k); ^ user.cpp:52:34: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d %d",&IN.x,&IN.y); ^ user.cpp:55:34: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d %d",&SF.x,&SF.y); ^ user.cpp:58:36: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&a[i][j]); ^