1 files changed, 47 insertions, 0 deletions
diff --git a/tests/sysy_lvX/046_simple_atoi.sy b/tests/sysy_lvX/046_simple_atoi.sy
new file mode 100644
index 0000000..d9a344a
--- /dev/null
+++ b/tests/sysy_lvX/046_simple_atoi.sy
@@ -0,0 +1,47 @@
+// Simple atoi program
+int atoi_(int src[]) {
+    int s;
+    s = 0;
+    int isMinus;
+    isMinus = 1;
+    int i;
+    i = 0;
+    while(src[i] == 32) { // 跳过空白符
+        i = i + 1; 
+    }
+
+    if(src[i] == 43 || src[i] == 45) {
+        if(src[i] == 45) {
+            isMinus = -1;
+        }
+        i = i + 1;
+    } else if (src[i] < 48 || src[i] > 57) {
+        //如果第一位既不是符号也不是数字，直接返回异常值
+        s = 2147483647;
+        return s;
+    }
+
+    while (src[i] != 0 && src[i] > 47 && src[i] < 58) {
+        s = s * 10 + src[i] - 48;
+        i = i + 1;
+    }
+    return s * isMinus;
+}
+
+int main () {
+    int string[500];
+    int temp;
+    temp = 0;
+    int i;
+    i = 0;
+    while (temp != 10) {
+        temp = getch();
+        string[i] = temp;
+        i = i + 1;
+    }
+    string[i] = 0;
+    i = atoi_(string);
+    putint(i);
+    return 0;
+}
+