我在MPLAB IDE6.4编译如下程序，老有BUILD FAILED！，不知为何？
#include <stdlib.h>#include <pic.h>
#include <math.h>
#defineuchar unsigned char
ustep(unsigned int x,unsigned y)
{ unsigned int n;
n=834/abs(x-y);
if(n==0)
n=1;
else if(n>255)
n=255;
return(n);
}
main()
{ uchar m;
m=ustep(1001,1000);
}
编译后的信息如下，且无法调试。
Executing: "d:\htsoft\ht-pic\BIN\PICC.EXE" -C -E"ABS.cce" "ABS.C" -O"ABS.obj" -I"D:\HTSOFT\HT-PIC\include" -Q -MPLAB -16C925 -D32 -Zg6 -O -W6
HI-TECH PICC COMPILER (Microchip PIC) V8.01 PL1
Copyright (C) 1984-2002 HI-TECH SOFTWARE
Serial number: HCPIC-00001
Licensed to: C WJ
Executing: "d:\htsoft\ht-pic\BIN\PICC.EXE" -E"cv9-pridecc.lde" "E:\11sh\picctry\CV9PART\ABS.obj" -Q -MPLAB -16C925 -D32 -LL -PSECTMAP -W6 -O"cv9-pridecc.cof" -O"cv9-pridecc.hex"
HI-TECH PICC COMPILER (Microchip PIC) V8.01 PL1
Copyright (C) 1984-2002 HI-TECH SOFTWARE
Serial number: HCPIC-00001
Licensed to: C WJ
Psect Usage Map:
Psect | Contents | Memory Range
---------|--------------------------|--------------------
powerup| Power on reset code | $0000 - $0003
end_init | Initialization code | $0004 - $0006
text0 | Program and library code | $0764 - $0771
text | Program and library code | $0772 - $07B0
float_te | Arithmetic routine code| $07B1 - $07FF
rbss_0 | Bank 0 RAM variables | $0020 - $0028
temp | Temporary RAM data | $0070 - $0076
Memory Usage Map:
Program ROM $0000 - $0006$0007 ( 7) words
Program ROM $0764 - $07FF$009C ( 156) words
$00A3 ( 163) words total Program ROM
Bank 0 RAM $0020 - $0028$0009 ( 9) bytes
Bank 0 RAM $0070 - $0076$0007 ( 7) bytes
$0010 ( 16) bytes total Bank 0 RAM
Program statistics:
Total ROM used 163 words (4.0%)
Total RAM used 16 bytes (9.1%)
BUILD FAILED: Mon Feb 09 17:37:11 2004 ustep(unsigned int x,unsigned y) //没有定义返回类型
{ unsigned int n;
n=834/abs(x-y);
if(n==0)
n=1;
else if(n>255)
n=255;
return(n);
}
改：
uchar ustep(unsigned int x,unsigned int y)
{ unsigned int n;
n=834/abs(x-y);
if(n==0)
n=1;
else if(n>255)
n=255;
return (uchar)(n);
}
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