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- char *concat(char *a, char *b){
- int lena = strlen(a);
- int lenb = strlen(b);
- char *con = malloc(lena+lenb+1);
- // copy & concat (including string termination)
- memcpy(con,a,lena);
- memcpy(con+lena,b,lenb+1);
- return con;
- }
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