How to operate c ++ list containers

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Using namespace std; struct n1 {string name; long num ;}; list
     
      
L; void charu () {n1 tmp; cin> tmp. name> tmp. num; if (tmp. num
      
        > Xs; l. remove_if (way);} void shanxuehao () {cin> xi; l. remove_if (way);} void xianshi () {list
       
         : Iterator I; for (I = l. begin (); I! = L. end (); I ++) cout <
        
          Name <"," <
         
           Num <
          
            > J; if (j = 1) {cout <"enter the name and student ID (e. g., Du Fu 123):" <
           
             > J; if (j = 1) shanmingzi (); else if (j = 2) shanxuehao (); else if (j = 3) quanshan ();} else if (j = 3) {xianshi ();} else if (j = 4) {cout <"1. order 2. reverse Order "<
            
              > J; if (j = 1) shunxu (); else if (j = 2) daoxu (); cout <"1. deduplication" <
             
               > J; if (j = 1) l. unique (same_integral_part) ;}} int main () {int j; while (1) {xuanze (); cout <"0. exit 1. return to the selection page "<
              
                > J; if (j = 0) return 0; system ("cls ");}}