View Compilation Error

0_0_33222796_21100.cpp: In function 'int main()':
0_0_33222796_21100.cpp:17:9: error: 'len' was not declared in this scope
         len=strlen(str);
         ^
0_0_33222796_21100.cpp:22:13: error: expected ';' before 'if'
             if(str[i]>='0' && str[i]<='9')
             ^
0_0_33222796_21100.cpp:33:26: error: 'pritnf' was not declared in this scope
             pritnf("NO\n");
                          ^