diff --git a/z3 b/z3
new file mode 100644
index 0000000..8e51f14
--- /dev/null
+++ b/z3
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+// 3函数功能:计算每门课程的总分和平均分
+void AverSumofEveryCourse(STU stu[], int n, int m){
+int i, j;
+float sum[COURSE NUM], aver[COURSE_NUM];/* ---------- begain -----_-___ */ for (j=0; j<m; j++){
+sum[j] = 0;
+for (i=0; i<n; i++){
+sum[j] += stu[i].score[j];}
+aver[j]=sum[j]/i;
+printf("student %d: sum = %.0f, aver = %.0f\n",
+j+1， sum[j]，aver[j]);
+}
+* end --________ */
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