Compilare: main.cpp: In function 'int main()': main.cpp:13:9: warning: this 'for' clause does not guard... [-Wmisleading-indentation] for(j=1;j<=n;j++) ^~~ main.cpp:15:13: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for' if(v[i][j]>0) ^~ main.cpp:27:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation] for(k=i1;k<=i1;k++) ^~~ main.cpp:30:9: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for' if(v[k][l]>0) ^~ main.cpp:26:16: warning: unused variable 'i2' [-Wunused-variable] int k,l,i1,i2,j1,j2,S=0; ^~ main.cpp:26:13: warning: 'i1' may be used uninitialized in this function [-Wmaybe-uninitialized] int k,l,i1,i2,j1,j2,S=0; ^~ main.cpp:26:19: warning: 'j1' may be used uninitialized in this function [-Wmaybe-uninitialized] int k,l,i1,i2,j1,j2,S=0; ^~ main.cpp:28:19: warning: 'j2' may be used uninitialized in this function [-Wmaybe-uninitialized] for(l=j1;l<=j2;l++) ~^~~~