0_0_16299785_17314.cpp: In function 'int main()': 0_0_16299785_17314.cpp:67:25: error: 'memset' was not declared in this scope memset(c1,0,sizeof(c1)); ^ 0_0_16299785_17314.cpp:70:13: error: 'strlen' was not declared in this scope n=strlen(a); ^