work/source: In function ‘int main()’:
work/source:103: error: ‘stdin’ was not declared in this scope
work/source:103: error: ‘freopen’ was not declared in this scope
work/source:104: error: ‘stdout’ was not declared in this scope
work/source:106: error: ‘scanf’ was not declared in this scope
work/source:114: error: ‘strlen’ was not declared in this scope
work/source:118: error: ‘memset’ was not declared in this scope
work/source:121: error: ‘printf’ was not declared in this scope
work/source:122: error: ‘printf’ was not declared in this scope
