while(keep1)
{
printf("请选择你需要的功能：");
scanf("%d",input_sci);
case 1:printf("sin");scanf("%lf",&num);c=num/180*3.14;printf("sin%g°=%.2f\n",num,sin(c));break;
case 2:printf("cos");scanf("%lf",&num);c=num/180*3.14;printf("cos%g°=%.2f\n",num,cos(c));break;
case 3:printf("tan");scanf("%lf",&num);c=num/180*3.14;printf("tan%g°=%.2f\n",num,tan(c));break;
case 4:printf("ln");scanf("%lf",&num);printf("ln%g=%.2f\n",num,log(num));break;
case 5:printf("lg");scanf("%lf",&num);printf("lg%g=%.2f\n",num,log10(num));break;
default:printf("输入错误\n");
}
在scanf语句后面加上
switch(input_sci){
最后一行哪里在加一个大括号}.
while(keep1)
{
printf("请选择你需要的功能：");
scanf("%d",input_sci);
switch(input_sci){
case 1:printf("sin");scanf("%lf",&num);c=num/180*3.14;printf("sin%g°=%.2f\n",num,sin(c));break;
case 2:printf("cos");scanf("%lf",&num);c=num/180*3.14;printf("cos%g°=%.2f\n",num,cos(c));break;
case 3:printf("tan");scanf("%lf",&num);c=num/180*3.14;printf("tan%g°=%.2f\n",num,tan(c));break;
case 4:printf("ln");scanf("%lf",&num);printf("ln%g=%.2f\n",num,log(num));break;
case 5:printf("lg");scanf("%lf",&num);printf("lg%g=%.2f\n",num,log10(num));break;
default:printf("输入错误\n");
}
}
while(keep1)
{
printf("请选择你需要的功能：");
scanf("%d",input_sci);
switch(input_sci)
{
case 1:printf("sin");scanf("%lf",&num);c=num/180*3.14;printf("sin%g°=%.2f\n",num,sin(c));break;
case 2:printf("cos");scanf("%lf",&num);c=num/180*3.14;printf("cos%g°=%.2f\n",num,cos(c));break;
case 3:printf("tan");scanf("%lf",&num);c=num/180*3.14;printf("tan%g°=%.2f\n",num,tan(c));break;
case 4:printf("ln");scanf("%lf",&num);printf("ln%g=%.2f\n",num,log(num));break;
case 5:printf("lg");scanf("%lf",&num);printf("lg%g=%.2f\n",num,log10(num));break;
default:printf("输入错误\n");
}
}望采纳，不懂的可以关注私信我。
scanf("%d",&input_sci); switch(input_sci) { case
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