0_0_22426609_24623.cpp: In function 'int main()': 0_0_22426609_24623.cpp:10:1: error: 'len' was not declared in this scope len=strlen(a); ^ 0_0_22426609_24623.cpp:12:9: error: 'I' was not declared in this scope for(i=1;I<len;i++) ^