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#include <stdio.h> #include <math.h> float mysin[91]; void InitSin(){ int i; for(i=0;i<90;i++){ mysin[i]=sin(M_PI/90.0*(double)i); } } float Sin(float rad){ int kakudo; kakudo=(int)(rad*180/M_PI); if(kakudo<0){ kakudo=-kakudo; } if(kakudo>90){ kakudo=kakudo%90; } return mysin[kakudo]; } int main(void) { InitSin(); for( int i=-360 ; i<=360 ; i+=15 ) { int sinp = (int)(sin((double)i*M_PI/180.0)*40.0) + 40; int Sinp = (int)(Sin((double)i*M_PI/180.0)*40.0) + 40; printf( "sin(%4d) ", i ); for( int p=0 ; p<=80 ; p++ ) { if( p==sinp ) { printf("*"); } else if( p==Sinp ) { printf("o"); } else if( p==40 ) { if( (abs(i)%90) == 0 ) printf( "+" ); else printf("|"); } else { printf(" "); } } printf( "\n" ); } return 0; }
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