meine apne prespective se question kiya toh koi or suggestion ho toh batana ankh khol kar likhna mein ankh  band karke codes likhta hu u Q20.   //value #include  <stdio.h> void  swap ( int , int ); void  main () {     int  n1 , n2 ;     printf ( "Enter the two numbers to be swapped \n " );     scanf ( " %d%d " , & n1 , & n2 );     printf ( " \n Before Swap n1= %d  n2= %d " , n1 , n2 );     swap ( n1 , n2 ); } void  swap ( int  n1 , int  n2 ) {     int  temp ;     temp  = n1 ;     n1  = n2 ;     n2  = temp ;     printf ( " \n After Swap n1= %d  n2= %d " , n1 , n2 ); } // ref.. #include  <stdio.h> void  swap1 ( int  * num1 , int  * num2 ); int  main () {     int  num1 , num2 ;     printf ( "Enter two numbers: " );     scanf ( " %d%d " , & num1 , & num2 );       printf ( " \n Before swap of num1 = %d  num2 = %d  \n...
 
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