摘要： 1.#includeint main(void){ int x,y; printf("Enter x:\n"); scanf("%d",&x); if(xint main (void){ int count,i,n; double grade,total; printf("Enter n:"); scanf("%d",&n); total=0; count=0; for(i=1;i=60){ count++; } } printf("Grade average=%.2f\n",t 阅读全文

摘要： 1.#includeint main(void){ double num1,num2; char op; printf("Type in an expression:"); scanf("%lf%c%lf",&num1,&op,&num2); if(op=='+') printf("=%.2f\n",num1+num2); else if(op=='-') printf("=%.2f\n",num1-num2); else if(op=='*' 阅读全文