Compilare: user.cpp: In function ‘void suma(int, int)’: user.cpp:12:88: warning: operation on ‘r’ may be undefined [-Wsequence-point] v[i][j][q]=(r+v[i][j-1][q]+v[i-1][j][q])-((r+=v[i][j-1][q]+v[i-1][j][q])/10)*10; ^ user.cpp: In function ‘void prod(int)’: user.cpp:18:66: warning: operation on ‘r’ may be undefined [-Wsequence-point] fact[i][q]=(r+fact[i-1][q]*i)-((r+=fact[i-1][q]*i)/10)*10; ^ user.cpp: In function ‘void prodMare(int*, int*, int*)’: user.cpp:30:40: warning: operation on ‘t’ may be undefined [-Wsequence-point] a[i]=(t+a[i])-((t+=a[i])/10)*10; ^ user.cpp: In function ‘void sumaSol(int*, int*)’: user.cpp:41:50: warning: operation on ‘t’ may be undefined [-Wsequence-point] a[i]=(t+a[i]+b[i])-((t+=a[i]+b[i])/10)*10; ^