pointer arithmetic operations

3 files changed, 44 insertions, 0 deletions

diff --git a/tests/022.sh b/tests/022.sh
index e9c8103..e5749f2 100644
--- a/tests/022.sh
+++ b/tests/022.sh
@@ -4,6 +4,8 @@ cat <<'EOF' > expected
 42 42
 EOF
 bash ../../test_diff.sh <<'EOF'
+int printf();
+
 int main() {
     int x;
     int* y;
diff --git a/tests/023.sh b/tests/023.sh
index 86e2aa6..cb77c22 100644
--- a/tests/023.sh
+++ b/tests/023.sh
@@ -18,6 +18,8 @@ sizeof(long***) = 8
 sizeof(void***) = 8
 EOF
 bash ../../test_diff.sh <<'EOF'
+int printf();
+
 int main() {
     printf("sizeof(int) = %d\n", sizeof(int));
     printf("sizeof(int*) = %d\n", sizeof(int*));
diff --git a/tests/024.sh b/tests/024.sh
new file mode 100644
index 0000000..5f9ff6f
--- /dev/null
+++ b/tests/024.sh
@@ -0,0 +1,40 @@
+set -e
+
+cat <<'EOF' > expected
+3
+3
+3
+EOF
+bash ../../test_diff.sh <<'EOF'
+int printf();
+
+int main() {
+    char c;
+    int i;
+    long l;
+    c = 42;
+    i = 42*2;
+    l = 42*3;
+
+    char* cp1;
+    char* cp2;
+    int* ip1;
+    int* ip2;
+    long* lp1;
+    long* lp2;
+
+    cp1 = &c;
+    cp2 = &c + 3;
+    printf("%d\n", cp2 - cp1);
+
+    ip1 = &i;
+    ip2 = &i + 3;
+    printf("%d\n", ip2 - ip1);
+
+    lp1 = &l;
+    lp2 = &l + 3;
+    printf("%d\n", lp2 - lp1);
+
+    return 0;
+}
+EOF