/in/lab5.c: In function 'main':
/in/lab5.c:160:74: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
                 if (top2==0 || (load_stack[top2-1]=='(' && top2>0 && top2<max_len)){
                                                                          ^
/in/lab5.c:162:100: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
                 }else if(precedence(infix[row][i])>precedence(load_stack[top2-1]) && top2>0 && top2<max_len){
                                                                                                    ^
/in/lab5.c:164:101: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
                 }else if(precedence(infix[row][i])==precedence(load_stack[top2-1]) && top2>0 && top2<max_len){
                                                                                                     ^
/in/lab5.c:170:100: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
                 }else if(precedence(infix[row][i])<precedence(load_stack[top2-1]) && top2>0 && top2<max_len){
                                                                                                    ^