0_0_19207771_14425.cpp: In function 'int main()': 0_0_19207771_14425.cpp:50:31: error: 'memset' was not declared in this scope memset(f,1,sizeof(f)); ^ 0_0_19207771_14425.cpp:53:21: error: 'strlen' was not declared in this scope l=strlen(c); ^