0_0_13598736_22572.cpp: In function 'int main()': 0_0_13598736_22572.cpp:50:19: error: 'len' was not declared in this scope for(j=len;j>=1;j--) ^ 0_0_13598736_22572.cpp:54:27: error: 'len' was not declared in this scope printf("%.2lf",dp[len]); ^