View Compilation Error

0_0_33937024_15249.cpp: In function 'int main()':
0_0_33937024_15249.cpp:28:96: error: lvalue required as left operand of assignment
           if(sl[i]='~'||sl[i]='!'||sl[i]='@'||sl[i]='#'||sl[i]='$'||sl[i]='$'||sl[i]='%'||sl[i]='^')
                                                                                                ^