js获取年月日的函数

function getBeforeDate(n){
            var n = n;
            var d = new Date();
            var year = d.getFullYear();
            var mon=d.getMonth()+1;
            var day=d.getDate();
            if(day <= n){
                if(mon>1) {
                    mon=mon-1;
                }
                else {
                    year = year-1;
                    mon = 12;
                }
            }
           d.setDate(d.getDate()-n);
           year = d.getFullYear();
           mon=d.getMonth()+1;
           day=d.getDate();
            s = year+"-"+(mon<10?('0'+mon):mon)+"-"+(day<10?('0'+day):day);
            return s;
        }
Rebuild started: Project: Project *** Using Compiler &#39;V6.22&#39;, folder: &#39;E:\Keil_v5\ARM\ARMCLANG\Bin&#39; Rebuild target &#39;Target 1&#39; assembling startup_stm32f10x_md.s... Start/core_cm3.c(445): error: non-ASM statement in naked function is not supported 445 | uint32_t result=0; | ^ Start/core_cm3.c(442): note: attribute is here 442 | uint32_t __get_PSP(void) __attribute__( ( naked ) ); | ^ Start/core_cm3.c(465): error: parameter references not allowed in naked functions 465 | "BX lr \n\t" : : "r" (topOfProcStack) ); | ^ Start/core_cm3.c(461): note: attribute is here 461 | void __set_PSP(uint32_t topOfProcStack) __attribute__( ( naked ) ); | ^ Start/core_cm3.c(479): error: non-ASM statement in naked function is not supported 479 | uint32_t result=0; | ^ Start/core_cm3.c(476): note: attribute is here 476 | uint32_t __get_MSP(void) __attribute__( ( naked ) ); | ^ Start/core_cm3.c(499): error: parameter references not allowed in naked functions 499 | "BX lr \n\t" : : "r" (topOfMainStack) ); | ^ Start/core_cm3.c(495): note: attribute is here 495 | void __set_MSP(uint32_t topOfMainStack) __attribute__( ( naked ) ); | ^ 4 errors generated. compiling core_cm3.c... compiling misc.c... compiling system_stm32f10x.c... compiling stm32f10x_adc.c... compiling stm32f10x_dac.c... compiling stm32f10x_exti.c... compiling stm32f10x_dbgmcu.c... compiling stm32f10x_dma.c... compiling stm32f10x_crc.c... compiling stm32f10x_cec.c... compiling stm32f10x_bkp.c... compiling stm32f10x_can.c... compiling stm32f10x_flash.c... compiling stm32f10x_pwr.c... compiling stm32f10x_fsmc.c... compiling stm32f10x_
03-31
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