View Compilation Error

0_0_16154022_31705.cpp: In function 'int main()':
0_0_16154022_31705.cpp:51:13: error: 'cha' was not declared in this scope
             cha r s[20];
             ^
0_0_16154022_31705.cpp:52:25: error: 's' was not declared in this scope
             scanf("%s", s);
                         ^