Compilare: main.cpp: In function 'void divide(int, int, int, int)': main.cpp:10:9: warning: suggest parentheses around comparison in operand of '&' [-Wparentheses] if(l<=n & c<=m && k<=n) { ~^~~ main.cpp:11:13: warning: suggest parentheses around comparison in operand of '&' [-Wparentheses] if(l==n & c==m) ~^~~ main.cpp:13:21: warning: suggest parentheses around comparison in operand of '&' [-Wparentheses] else if(s[k]>='0' & s[k]<='9') { ~~~~^~~~~ main.cpp: In function 'int main()': main.cpp:42:21: warning: suggest parentheses around comparison in operand of '&' [-Wparentheses] else if(s[i]>='0' & s[i]<='9') ~~~~^~~~~ main.cpp:44:25: warning: suggest parentheses around comparison in operand of '&' [-Wparentheses] else if(!(s[i-1]>='0' & s[i-1]<='9')) ~~~~~~^~~~~