Compilare: user.cpp: In function ‘int main()’: user.cpp:21:62: warning: format ‘%d’ expects argument of type ‘int*’, but argument 3 has type ‘int8_t* {aka signed char*}’ [-Wformat=] for (i=1;i<=n;i++) for (j=1;j<=m;j++) {fscanf(f,"%d",&v[i][j]); ^ user.cpp:20:52: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d %d %d %d %d %d",&n,&m,&l1,&c1,&l2,&c2); ^ user.cpp:21:63: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] for (i=1;i<=n;i++) for (j=1;j<=m;j++) {fscanf(f,"%d",&v[i][j]); ^