CS153/hw5/hw4programs/lib13.oat

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global str1 = "Hello ";
string string_concat (string str1, string str2) {
var arr1 = array_of_string (str1);
var arr2 = array_of_string (str2);
var len1 = length_of_array (arr1);
var len2 = length_of_array (arr2);
var arr3 = new int[len1+len2];
var i = 0;
for(var j=0; j<len1; j=j+1;) {
arr3[i] = arr1[j];
i=i+1;
}
for(var j=0; j<len2; j=j+1;) {
arr3[i] = arr2[j];
i=i+1;
}
return string_of_array (arr3);
}
int program (int argc, string[] argv) {
var str2 = "world!";
print_string (string_concat (str1, str2));
return 0;
}