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public text v1 · immutablecalul.c: In function main:
calul.c:13: warning: incompatible implicit declaration of built-in function strlen
calul.c:22: error: invalid lvalue in unary &
calul.c:22: error: expected ) before r
calul.c:61: error: expected ; before } token
calul.c:61: error: expected declaration or statement at end of input