View Compilation Error

0_0_28384966_6734.cpp: In function 'int main()':
0_0_28384966_6734.cpp:12:5: error: 'i' was not declared in this scope
 for(i=1;i<c;i++){
     ^
0_0_28384966_6734.cpp:21:5: error: 'i' was not declared in this scope
 for(i=1;i<=c;i++){
     ^