View Compilation Error

0_0_16697782_1715.cpp:4:11: error: 'a' was not declared in this scope
 int sort (a,a+l);
           ^
0_0_16697782_1715.cpp:4:13: error: 'a' was not declared in this scope
 int sort (a,a+l);
             ^
0_0_16697782_1715.cpp:4:15: error: 'l' was not declared in this scope
 int sort (a,a+l);
               ^
0_0_16697782_1715.cpp:4:16: error: expression list treated as compound expression in initializer [-fpermissive]
 int sort (a,a+l);
                ^
0_0_16697782_1715.cpp: In function 'int main()':
0_0_16697782_1715.cpp:13:9: error: 'l' was not declared in this scope
         l=strlen(a);
         ^
0_0_16697782_1715.cpp:13:19: error: cannot convert 'int*' to 'const char*' for argument '1' to 'size_t strlen(const char*)'
         l=strlen(a);
                   ^
0_0_16697782_1715.cpp:14:19: error: 'sort' cannot be used as a function
         sort(a,a+l);
                   ^