芯片:CH583
代码
static char xxx[10]={"3.14"}; float pi; char fbuf[20]; DBG("x = %s\n",xxx); sscanf(xxx,"%f",&pi); sprintf(fbuf,"%.2f",pi); DBG("pi = %.2f\n",pi); DBG("fbuf = %s\n",fbuf); float rlt = strtof(xxx, NULL); sprintf(fbuf,"%.2f",rlt); DBG("rlt = %.2f\n",rlt); DBG("fbuf = %s\n",fbuf); float fpi = 3.14; sprintf(fbuf,"%.2f",fpi); DBG("fpi = %.2f\n",fpi); DBG("fpi*100 = %d\n",(int)(fpi*100)); DBG("fbuf = %s\n",fbuf);
DBG宏的实现
#define DBG(...) printf(" DBG(%s, %s(), %d): ", __FILE__, __FUNCTION__, __LINE__); printf(__VA_ARGS__)
打印结果
DBG(../src/Main.c, main(), 749): x = 3.14 DBG(../src/Main.c, main(), 752): pi = 26815622256785016688296265592222112551708132452936578279936498398813364362571671098643215977672002762693733515732368436221370366071748541264718157228015616.00 DBG(../src/Main.c, main(), 753): fbuf = 2.00 DBG(../src/Main.c, main(), 756): rlt = 26815615859885384735558591743984408416899026634245440356407978903749122491113867963109291794919019276406862025209102462237971718664841348387476629572550656.00 DBG(../src/Main.c, main(), 757): fbuf = 2.00 DBG(../src/Main.c, main(), 760): fpi = 26815615859885384735558591743984408416899026634245440356407978903749122491113867963109291794919019276406862025209102462237971718664841348387476629572550656.00 DBG(../src/Main.c, main(), 761): fpi*100 = 314 DBG(../src/Main.c, main(), 762): fbuf = 2.02
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