Question

我有一个浮点值, 我想四舍五入到最近的总计, 我找到了一些数学函数, 但没有工作。

现在的潜在利润是300.52 所以请如何四舍五入

     float potentialprofit=otherthanCereniaAnnual*totalProfit;
     NSString*potentialProfitTitle=[NSString stringWithFormat:@"%.2f",potentialprofit];

[potentialProfit setTitle:potentialProfitTitle forState:UIControlStateNormal];

Answer 1

int result = (int)ceilf(myFloat );
int result = (int)roundf(myFloat );
int result = (int)floor(myFloat);

float result = ceilf(myFloat );
float result = roundf(myFloat );
float result = floor(myFloat);

我想这会对你有所帮助

Answer 2

尝试此选项 :

float f = ...;
f = (int)(f+0.5);

if you want to handle negative value, 尝试此选项 :

f = (int)(f < 0 ? f-0.5 : f+0.5);

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