关于C 读取pgm图片 处理并另存的问题

[yiluoke22]

#include <stdio.h>
#include <stdlib.h>
#include <math.h>


int main(void) {
FILE *fp;
int i,j,k,el;
float sum, s;
char buf1[128],buf2[128],buf3[128],buf4[128];
int Height,Width,depth,DstHeight,DstWidth;
int SrcCX,SrcCY,DstCX,DstCY;
int x1,y1,x2,y2,x,y,dx,dy;
int int_sin,int_cos;
double A = 0.15; 

double Sin=sin(A);
double Cos=cos(A);

unsigned char pluTBL[256*256];
unsigned char Top;     //上端1次補間結果
unsigned char Bottom;

unsigned char** dens, **image;

fp= fopen("test4.pgm","rb");
if (fp==NULL){
	printf("error!!");
}

fgets(buf1,128,fp);
puts(buf1);

fgets(buf2,128,fp);
puts(buf2);
sscanf(buf2,"%d",&Width);

fgets(buf3,128,fp);
puts(buf3);
sscanf(buf3,"%d",&Height);

fgets(buf4,128,fp);
puts(buf4);
sscanf(buf4,"%d",&depth);

dens   = (unsigned char**) malloc(sizeof(unsigned char**)*Height);
dens[0]= (unsigned char*)  malloc(sizeof(unsigned char*)*Height*Width);

for (i=0;i<Height;i++){
	dens[i]= dens[0]+i*Width; 
}

for (i=0;i<Height;i++){
	for (j=0;j<Width;j++){
	dens[i][j]= fgetc(fp);
	}
}

for (i=0;i<20;i++) {
for (j=0;j<20;j++){
	printf(" %d",dens[i][j]);
}
   printf("\n");
}

DstWidth=(int)(fabs(Width*Cos)+fabs(Height*Sin)+0.5);
DstHeight=(int)(fabs(Width*Sin)+fabs(Height*Cos)+0.5);

printf(" %d,,,%d",DstWidth,DstHeight);


image= (unsigned char**) malloc(sizeof(unsigned char**)*DstHeight);
image[0]= (unsigned char*)malloc(sizeof(unsigned char*)*DstHeight*DstWidth);


for (i=0;i<DstHeight;i++){
	image[i]= image[0]+i*DstWidth;
}

for (i=0;i<DstHeight;i++){
	for (j=0;j<DstWidth;j++){
		image[i][j]= 0;
	} 
}

for (i=0;i<20;i++) {
for (j=0;j<20;j++){
	printf(" %d",image[i][j]);
}
   printf("\n");
}

fclose(fp);
//--------------
SrcCX = Width / 2;
SrcCY = Height / 2;
DstCX = DstWidth / 2;
DstCY = DstHeight / 2;
printf("   %d,,,%d,,,%d,,,%d",SrcCX,SrcCY,DstCX,DstCY);
int_cos = (int)(Cos * 1024);
int_sin = (int)(Sin * 1024);
printf("   %d,,,%d",int_cos,int_sin);



for(y2=0; y2 < DstHeight; y2++) { 
    for(x2=0; x2 < DstWidth; x2++) { 

    //  x = ((x2-DstCX) * int_cos - (y2-DstCY) * int_sin) + (SrcCX << 10);
    //  y = ((x2-DstCX) * int_sin + (y2-DstCY) * int_cos) + (SrcCY << 10);

        //入力画像位置を計算 
   //   x1 = x >> 10;
   //   y1 = y >> 10;

      x1 = (((x2-DstCX)*int_cos - (y2-DstCY)*int_sin) >> 10) + SrcCX;
      y1 = (((x2-DstCX)*int_sin + (y2-DstCY)*int_cos) >> 10) + SrcCY;
//printf("   %d,,,%d",x1,y1);

       if( x1 >= 0  &&  x1 <Width-1  &&  y1 >= 0  &&  y1 < Height-1 ) { 
			//dx = (x - (x & 0xfffffc00)) >> 2;
           // dy = (y - (y & 0xfffffc00)) >> 2;

	       // Top = pluTBL[(dens[y1][x1]<<8)+(255-dx)] + pluTBL[(dens[y1][x1+1]<<8)+dx];
          //  Bottom = pluTBL[(dens[y1+1][x1]<<8)+(255-dx)] + pluTBL[(dens[y1+1][x1+1]<<8)+dx];
          //  image[y2][x2]  = pluTBL[(Top<<8)+(255-dy)] + pluTBL[(Bottom<<8)+dy];
          
           image[y2][x2] = dens[y1][x1]; 
        } 
    } 
}

for (i=35;i<80;i++) {
for (j=35;j<80;j++){
	printf(" %d",image[i][j]);
}
   printf("\n");

}

free(dens);

fp= fopen("out.pgm","wb");
if (fp==NULL){
	printf("error!!");
	exit(0);
}
fputs(buf1,fp);//puts(buf1);

fputs(buf2,fp);//puts(buf2);

fputs(buf3,fp);//puts(buf3);

fputs(buf4,fp);//puts(buf4);

for (i=0;i<DstHeight;i++){
	for (j=0;j<DstWidth;j++){
		fputc(image[i][j],fp);
	}
}

fclose(fp);

printf("image %d %d\n", DstHeight,DstWidth);

free(image);

}

源代码如上，读取图片并按中心点旋转 之后保存，结果另存的图片模糊一片，而且大小也没变化，问题在于 由于 处理之后图片大小有变动 比原来稍大，那么在保存的时候可以用fputs(buf1,fp)吗？

[yiluoke22]

我自己觉得问题出在保存的时候
fputs(buf1,fp);//puts(buf1);

fputs(buf2,fp);//puts(buf2);

fputs(buf3,fp);//puts(buf3);

fputs(buf4,fp);//puts(buf4);

有高手可以指点下吗

[赵4老师]

fgets改为fread
fputs改为fwrite

[yiluoke22]

改为 fread(buf1,128,1,fp);
fwrite(buf1,128,1,fp);
之后 完全不行啊 调试不出错 但是运行之后 出的全是乱码，程序也报错了