sysy-data/functional/sy/27_while_test2.sy

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int FourWhile() {
int a;
a = 5;
int b;
int c;
b = 6;
c = 7;
int d;
d = 10;
while (a < 20) {
a = a + 3;
while(b < 10){
b = b + 1;
while(c == 7){
c = c - 1;
while(d < 20){
d = d + 3;
}
d = d - 1;
}
c = c + 1;
}
b = b - 2;
}
return (a + (b + d) + c);
}
int main() {
return FourWhile();
}